Air conditioning system with intermittent heat exchange function

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses an air conditioning system with an intermittent heat exchange function, comprising: an air conditioning unit comprising an outdoor heat exchanger and at least one indoor heat exchanger, the indoor heat exchanger being a three-medium heat exchanger; the outdoor heat exchanger is communicated with the first medium channel of the indoor heat exchanger and forms a first refrigerant circulation loop; the heat exchange unit comprises at least one radiation heat exchange device; an internal pipeline of the radiation heat exchange device is communicated with a second medium channel of the indoor heat exchanger to form a second refrigerant circulation loop; wherein at least one side of the second medium channel of each indoor heat exchanger is provided with a first valve, at least one side of the internal pipeline of each radiation heat exchange device is provided with a second valve, the second refrigerant circulation loop is provided with a circulation pump, and multiple functional modes are achieved by controlling the states of the circulation pump and the multiple valves. The air conditioning system is more suitable for various working condition requirements, the operation energy efficiency can be effectively improved, and the structure of the air conditioning system is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to an air conditioning system with an intermittent heat exchange function. Background Art

[0002] The heat exchange terminals of existing air conditioning systems mainly include convection terminals and radiation terminals. Among them, convection terminals can achieve rapid production of cold and heat, such as the air-cooled heat exchange method of air conditioners; radiation terminals can improve human comfort perception, such as the radiation heat exchange method of floor heating. Based on the characteristics of the two types of terminals, there are certain differences in the heating forms of the corresponding systems: direct expansion convection terminals such as air conditioners are mostly used in southern my country, and heating is carried out in an intermittent operation mode that starts and stops on demand. It heats up quickly in the startup phase, but after stable operation, the blowing feeling is obvious for a long time, the comfort is poor, and the power consumption is high; in northern my country, radiation terminals such as floor heating and radiators are mostly used, and heating is carried out in a continuous operation mode. Although it can meet the needs of high comfort, it also leads to problems such as long heating time and high overall operating energy consumption. In today's increasingly tight energy situation, the intermittent heating method of "heating when people are in and stopping when people leave" is undoubtedly energy-saving. However, sacrificing indoor thermal comfort in exchange for energy saving is not desirable and long-term.

[0003] At present, a heating and air-conditioning method that combines the advantages of two terminals is to set up a refrigerant-water intermediate heat exchanger in the multi-split system separately, use the heat of the refrigerant to exchange heat with water, and then transport the water after heat exchange to the terminal for heat exchange with the indoor environment; its main working method is to use the convection terminal of the multi-split air-conditioning system for air-cooling heat exchange during cooling, and use the radiation terminal of the multi-split air-conditioning system for radiation heat exchange during heating.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Due to the large specific heat capacity of the radiation terminal, the heating response speed is slow, it is difficult to operate intermittently, and the actual operating energy consumption is relatively high. Moreover, under different working conditions, only a single terminal is used to exchange heat indoors. The multi-split air-conditioning system can only operate in a continuous, single heating mode, failing to give full play to the respective advantages of convection and radiation terminals. At the same time, the relevant design requires the addition of additional intermediate heat exchangers and heat exchange pipelines, which also increases the system structure complexity and manufacturing costs. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The disclosed embodiment provides an air conditioning system with an intermittent heat exchange function to solve the technical problems of the existing air conditioning system integrating convection terminals and radiation terminals, such as a single heating mode, high energy consumption and complex structure.

[0008] In some embodiments, the air conditioning system includes:

[0009] An air conditioning unit, comprising an outdoor heat exchanger and at least one indoor heat exchanger, wherein the indoor heat exchanger is a three-medium heat exchanger; the outdoor heat exchanger is connected to a first medium channel of the indoor heat exchanger and is configured to form a first refrigerant circulation loop;

[0010] A heat exchange unit, comprising at least one radiation heat exchange device; the internal pipeline of the radiation heat exchange device is connected to the second medium channel of the indoor heat exchanger and is configured to form a second refrigerant circulation loop, so that the indoor heat exchanger can controllably supply energy to the radiation heat exchange device;

[0011] Among them, a first valve is provided on at least one side of the second medium channel of each indoor heat exchanger, a second valve is provided on at least one side of the internal pipeline of each radiation heat exchange device, and a circulating pump is provided on the second refrigerant circulation loop, so that multiple functional modes can be realized by controlling the status of the circulating pump and multiple valves.

[0012] In some embodiments, the air conditioning system has a first heat exchange mode, which corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump is turned off, and the first valve and the second valve are closed to use the indoor heat exchanger to exchange heat with the indoor air.

[0013] In some embodiments, the air conditioning system has a second heat exchange mode, which corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the indoor heat exchanger stops exchanging heat with the indoor air, the circulation pump is turned on, and the first valve and the second valve are opened to use the indoor heat exchanger to supply cooling / heating to the radiation heat exchange device and the radiation heat exchange device exchanges heat with the indoor air.

[0014] In some embodiments, the air conditioning system has a dual heat exchange mode, which corresponds to the first refrigerant circulation loop running a refrigeration or heating cycle, the circulation pump is turned on, the first valve and the second valve are opened to use the indoor heat exchanger and the radiation heat exchange device to simultaneously exchange heat with the indoor air.

[0015] In some embodiments, the air conditioning system has an intermittent heat exchange mode, the intermittent heat exchange mode having a first heat exchange state corresponding to a first time interval, and a second heat exchange state corresponding to a second time interval;

[0016] The first heat exchange state corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump is turned off, the first valve and the second valve are closed, so that the indoor heat exchanger is used to exchange heat with the indoor air; or the first refrigerant circulation loop runs a cooling or heating cycle, the indoor heat exchanger stops exchanging heat with the indoor air, the circulation pump is turned on, the first valve and the second valve are opened, so that the indoor heat exchanger is used to supply cooling / heating to the radiation heat exchange device and the radiation heat exchange device exchanges heat with the indoor air;

[0017] The second heat exchange state corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump is turned on, and the first valve and the second valve are opened to utilize the indoor heat exchanger and the radiation heat exchange device to simultaneously exchange heat with the indoor air.

[0018] In some embodiments, the number of indoor heat exchangers is multiple and connected in parallel to the second refrigerant circulation loop, and the number of radiation heat exchange devices is multiple and connected in parallel to the second refrigerant circulation loop;

[0019] At least one indoor heat exchanger and at least one radiation heat exchange device are used for heat exchange in the same indoor space, at least two indoor heat exchangers are used for heat exchange in different indoor spaces, and at least two radiation heat exchange devices are used for heat exchange in different indoor spaces.

[0020] In some embodiments, the air conditioning system has a low-load heat exchange mode. In the low-load heat exchange mode, the first refrigerant circulation loop runs a cooling or heating cycle, controls the indoor heat exchanger and / or radiation heat exchange device corresponding to at least one indoor space with heat exchange demand to exchange heat with the indoor air, and controls the indoor heat exchanger corresponding to at least one indoor space without heat exchange demand to supply energy to the second refrigerant circulation loop.

[0021] In some embodiments, the inflow side of the internal pipelines of the plurality of radiation heat exchange devices is connected in parallel to the second refrigerant circulation loop through a liquid distributor, and the outflow side is connected in parallel to the second refrigerant circulation loop through a liquid collector;

[0022] A bypass branch is also connected between the liquid distributor and the liquid collector, and a balancing valve is provided on the bypass branch to adjust the hydraulic pressure between the liquid distributor and the liquid collector.

[0023] In some embodiments, the liquid separator is further provided with a constant pressure device, which is used to buffer the hydraulic pressure changes of the second refrigerant circulation loop.

[0024] In some embodiments, the radiation heat exchange device includes a ceiling heat radiator, a wall heat radiator, a floor heat radiator, or a liquid heat storage device.

[0025] The air conditioning system with intermittent heat exchange function provided by the embodiment of the present disclosure can achieve the following technical effects:

[0026] The air-conditioning system provided by the embodiment of the present disclosure includes an air-conditioning unit and a heat exchange unit, wherein the indoor heat exchanger of the air-conditioning unit can be used for convection heat exchange, and the radiation heat exchange device of the heat exchange unit can be used for radiation heat exchange. By controlling the circulation pump and the valve, one or both of the two heat exchange forms can be conveniently selected according to different needs, so that the heat exchange mode of the air-conditioning system is more adapted to the working conditions, thereby effectively improving the operating energy efficiency; at the same time, by using the indoor heat exchanger to supply energy to the radiation heat exchange device, the structural complexity of the air-conditioning system can be reduced, and there is no need to additionally configure an intermediate heat exchanger, thereby saving production costs.

[0027] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0029] Figure 1 is a schematic diagram of an air conditioning system provided by an embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of the operation of the air-conditioning system provided by an embodiment of the present disclosure in a first heat exchange mode;

[0031] Figure 3 is a schematic diagram of the operation of the air-conditioning system provided by an embodiment of the present disclosure in a second heat exchange mode;

[0032] Figure 4 is a schematic diagram of the operation of the air conditioning system provided by the embodiment of the present disclosure in a dual heat exchange mode;

[0033] Figure 5a is an operation schematic diagram of the air-conditioning system provided by an embodiment of the present disclosure in the first heat exchange state in the intermittent heat exchange mode;

[0034] Figure 5b is an operation schematic diagram of the air-conditioning system provided by an embodiment of the present disclosure in the second heat exchange state in the intermittent heat exchange mode;

[0035] Figure 6 It is a schematic diagram of the operation of the air-conditioning system provided in the embodiment of the present disclosure in the small load heat exchange mode.

[0036] Reference numerals:

[0037] 100, air conditioning unit; 110, indoor heat exchanger; 111, first indoor heat exchanger; 112, second indoor heat exchanger; 113, third indoor heat exchanger; 120, outdoor heat exchanger; 130, compressor; 140, four-way valve; 150, indoor fan; 160, switching valve;

[0038] 200, heat exchange unit; 210, radiation heat exchange device; 211, first radiation heat exchange device; 212, second radiation heat exchange device; 213, third radiation heat exchange device; 220, auxiliary heat pipeline; 230, circulation pump; 241, liquid distributor; 242, liquid collector; 250, balancing valve; 260, constant pressure device; 271, first valve; 272, second valve. DETAILED DESCRIPTION

[0039] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0040] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0042] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0043] Unless otherwise stated, the term "plurality" means two or more.

[0044] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0045] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0046] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0047] Combination Figure 1 As shown, in some optional embodiments, the air conditioning system with intermittent heat exchange function mainly includes an air conditioning unit 100 and a heat exchange unit 200. The air conditioning unit 100 can be used to perform convective heat exchange with the indoor environment through components such as an indoor heat exchanger to achieve functions such as cooling and heating; the heat exchange unit 200 is mainly used to perform radiant heat exchange with the indoor environment through a radiant heat exchange device, and can also be used to achieve functions such as cooling and heating.

[0048] The air conditioning unit 100 mainly includes an indoor heat exchanger 110, an outdoor heat exchanger 120, a compressor 130, a throttling device (not shown in the figure), a four-way valve 140 and the like.

[0049] Here, the body of the air-conditioning unit 100 includes two major parts: an indoor unit and an outdoor unit. The indoor unit is arranged on the indoor side, and is provided with an indoor heat exchanger 110 and an indoor fan 150, which are used to exchange heat between the refrigerant and the indoor environment under the wind drive of the indoor fan 150, so as to absorb indoor heat for cooling or release heat for heating; the outdoor unit is arranged on the outdoor side, and components such as a compressor 130, an outdoor heat exchanger 120 and a four-way valve 140 are arranged in the outdoor unit.

[0050] The multiple components of the air-conditioning unit 100 are connected by refrigerant pipelines and are constructed into a first refrigerant circulation loop filled with refrigerant. The refrigerant can circulate along the first refrigerant circulation loop to achieve heat transfer between the indoor and outdoor sides.

[0051] Optionally, the number of indoor heat exchangers 110 is one or more; the embodiments of the present disclosure and the following text are described by taking a "one-to-many" air conditioner model as an example, and its indoor unit has multiple indoor heat exchangers 110, such as Figure 1 The air conditioning unit 100 shown is provided with N indoor heat exchangers 110, which are connected in parallel and each parallel branch is provided with a switching valve 160. The switching valve 160 can be used to control the on / off state of each parallel branch, thereby controlling the specific activated indoor heat exchanger.

[0052] Optionally, the switching valve 160 is disposed on the outflow side or the inflow side of each parallel branch located at the indoor heat exchanger 110, such as Figure 1 It is shown that the switching valve 160 is provided on the inflow side (cooling flow direction) of the indoor heat exchanger 110 .

[0053] In some embodiments, the indoor heat exchanger 110 is a three-medium heat exchanger having at least three medium channels, including a first medium channel, a second medium channel, and a third medium channel, which is configured to enable heat exchange between any two or three of the three medium channels.

[0054] The first medium channel is used to communicate with the refrigerant pipeline corresponding to the first refrigerant circulation loop of the air conditioning unit 100, the second medium channel is used to communicate with the second refrigerant circulation loop; and the third medium channel is connected to the internal air duct of the indoor unit. In this way, the refrigerant in the first refrigerant circulation loop, the medium circulating in the second refrigerant circulation loop, and the air in the internal air duct of the indoor unit can realize mutual heat exchange in the three-medium heat exchanger.

[0055] Exemplarily, a three-medium heat exchanger is used to allow the refrigerant flowing through the first medium channel to exchange heat with the medium flowing through the second medium channel, such as using a high-temperature refrigerant to heat up the medium, or using a low-temperature refrigerant to cool down the medium; or, a three-medium heat exchanger is used to allow the medium flowing through the second medium channel to exchange heat with the air flowing through the third medium channel, such as using a high-temperature medium to heat up the air, or using a low-temperature medium to cool down the air; or, a three-medium heat exchanger is used to allow the refrigerant flowing through the first medium channel to simultaneously exchange heat with the medium flowing through the second medium channel and the air flowing through the third medium channel, such as using a high-temperature refrigerant to simultaneously heat up the medium and the air, or using a low-temperature refrigerant to simultaneously cool the medium and the air, etc.

[0056] In this embodiment, the switching valve 160 mentioned above is disposed on the pipeline corresponding to the first medium channel, so that the switching valve 160 is used to control the on-off state of the refrigerant flowing through the first medium channel.

[0057] In some optional embodiments, the heat exchange unit 200 mainly includes a radiation heat exchange device 210 and an auxiliary heat pipeline 220, wherein the internal pipeline of the radiation heat exchange device is connected to the second medium channel of the indoor heat exchanger 110 through the auxiliary heat pipeline 220 and is constructed as a second refrigerant circulation loop, which is used to enable the indoor heat exchanger 110 to supply energy to the radiation heat exchange device 210 in a controlled manner, including supplying cold or heat. Here, the medium in the second refrigerant circulation loop is a carrier of cold and heat. The radiation heat exchange device 210 can use the medium flowing through it to exchange heat with the external environment. For example, when a low-temperature medium flows through the radiation heat exchange device 210, the radiation heat exchange device 210 can play a role in cooling the indoor room; and when a medium-high temperature medium flows through the radiation heat exchange device 210, the radiation heat exchange device 210 can play a role in heating and warming the indoor room.

[0058] In some embodiments, the second refrigerant circulation loop is further provided with a circulation pump 230, which is configured to controllably drive the medium to circulate along the second refrigerant circulation loop. Therefore, in this embodiment, the circulation pump 230 can be used to provide driving force for the medium to circulate in the second refrigerant circulation loop.

[0059] Optionally, in combination with the previous embodiments, the second medium channels of the multiple indoor heat exchangers 110 of the air-conditioning unit 100 are connected to the auxiliary heat pipe 220 in parallel, and a first valve 271 is provided on each parallel branch. The first valve 271 can be used to control the on-off state of the second medium channels corresponding to each parallel branch, thereby controlling whether the first medium channels and the second medium channels in each indoor heat exchanger 110 perform heat exchange.

[0060] In the embodiment, in the medium circulation flow direction defined by the circulation pump 230 , the first valve 271 is disposed at the inflow side of the second medium channel of each indoor heat exchanger 110 .

[0061] Combination Figure 1 In the embodiment shown, the liquid inlet ends of the second medium channels corresponding to each indoor heat exchanger 110 are connected in parallel to the auxiliary heat pipeline 220, and the liquid outlet ends are connected in parallel to the auxiliary heat pipeline 220; in this way, when the second refrigerant circulation loop is working, the medium is first diverted along each parallel branch to the corresponding indoor heat exchanger 110 for heat exchange respectively, and then the medium after heat exchange with the refrigerant is re-converged into the auxiliary heat pipeline 220.

[0062] In this embodiment, for the above-mentioned "one-to-many" air-conditioning form, each indoor heat exchanger 110 corresponds to a different indoor space. Since the heat exchange temperatures set for different indoor heat exchangers 110 may be different and the real-time temperatures of the corresponding indoor spaces are different, the amount of heat that each indoor heat exchanger 110 can use to heat the medium is also different. Therefore, through the above-mentioned parallel structure design, not only can the heat exchange unit 200 concentrate as much heat as possible from multiple indoor heat exchangers, but it can also mix the media from different indoor heat exchangers 110 to make the temperature of the medium finally used for radiation heat exchange more uniform.

[0063] Optionally, in this embodiment, the heat exchange unit 200 has a plurality of radiation heat exchange devices, that is, a plurality of indoor heat exchangers 110 provide cooling / heating to a plurality of radiation heat exchange devices 210 .

[0064] Each radiation heat exchange device is connected to the auxiliary heat pipeline 220 in parallel, and a second valve 272 is respectively provided on each parallel branch. The second valve 272 can be used to control the on-off state of the internal pipeline of the radiation heat exchange device 210 corresponding to each parallel branch, and then control whether each radiation heat exchange device 210 exchanges heat with the indoor air; the liquid inlet interfaces corresponding to each radiation heat exchange device 210 are connected to the auxiliary heat pipeline 220 in parallel, and the liquid outlet interfaces are connected to the auxiliary heat pipeline 220; in this way, when the second refrigerant circulation loop is working, the medium is first diverted along each parallel branch to the corresponding radiation heat exchange device 210 for radiation heat exchange, and then the medium after heat exchange with the external environment is re-converged into the auxiliary heat pipeline 220.

[0065] In some embodiments, the heat exchange unit 200 further includes a liquid separator 241 and a liquid collector 242, which are used to connect the parallel branches corresponding to the plurality of radiation heat exchange devices 210 in parallel to the auxiliary heat pipeline 220. In an embodiment, the inflow side of the internal pipelines of the plurality of radiation heat exchange devices 210 is connected in parallel to the auxiliary heat pipeline 220 through the liquid separator 241, and the outflow side is connected in parallel to the auxiliary heat pipeline 220 through the liquid collector 242.

[0066] Optionally, the liquid distributor 241 has a liquid distributor main pipe and a plurality of liquid distributor branches, wherein the liquid distributor main pipe serves as the medium inflow end of the liquid distributor 241, and the liquid distributor branch serves as the medium outflow end of the liquid distributor 241. Here, the liquid distributor main pipe is connected to the auxiliary heat pipeline 220; the number of liquid distributor branches matches the number of radiation heat exchange devices 210, and the parallel branches corresponding to each radiation heat exchange device 210 are connected to each liquid distributor branch one by one.

[0067] Optionally, the liquid collector 242 has a liquid collecting main pipe and a plurality of liquid collecting branch pipes, wherein the liquid collecting main pipe is used as the medium outflow end of the liquid distributor 241, and the liquid collecting branch pipe is used as the medium inflow end of the liquid distributor 241. Here, the liquid collecting main pipe is connected to the auxiliary heat pipeline 220; the number of liquid collecting branch pipes is adapted to the number of radiation heat exchange devices 210, and the parallel branches corresponding to each radiation heat exchange device 210 are connected to each liquid collecting branch pipe one by one.

[0068] In some embodiments, a bypass branch is also connected between the liquid separator 241 and the liquid collector 242, and the bypass branch can connect the medium flow paths inside the liquid separator 241 and the liquid collector 242; the bypass branch is provided with a balancing valve 250 to adjust the hydraulic pressure between the liquid separator 241 and the liquid collector 242.

[0069] In this way, when the medium pressure in one of the distributor 241 or the collector 242 is too high, the balance valve 250 is turned on to guide part of the medium to the other one through the bypass branch, which can disperse the hydraulic pressure and avoid damage caused by excessive pressure.

[0070] In some embodiments, the liquid separator 241 is further provided with a constant pressure device 260, which is used to buffer the hydraulic pressure change of the second refrigerant circulation loop.

[0071] Optionally, the type of constant pressure device 260 is a constant pressure tank, which is defined as a tank that can provide a variable volume space for the volume change caused by the change in temperature of the medium in the flow path; here, the working principle of the constant pressure tank is: when the external pressurized medium enters the constant pressure tank, the nitrogen sealed in the tank is compressed, which can vacate part of the tank volume occupied by the original gas, and fill the medium into this part of the volume until the gas pressure in the tank is consistent with the medium hydraulic pressure; when the medium pressure decreases (the gas pressure in the tank is greater than the medium hydraulic pressure), the gas expands and squeezes the medium in the tank out of the tank again to allow this part of the medium to return to the second refrigerant circulation loop to participate in the circulation.

[0072] In some embodiments, the radiation heat exchange device 210 includes at least one or more of a ceiling heat radiator, a wall heat radiator, a floor heat radiator, or a liquid heat storage device.

[0073] Optionally, the medium is water or ethylene glycol, etc.

[0074] In multiple embodiments of the present disclosure, multiple functional modes of the air-conditioning system can be achieved by controlling the states of multiple valves such as the circulation pump 230 and the first valve 271, the second valve 272, etc.; here, the functional modes of the air-conditioning system include at least a first heat exchange mode, a second heat exchange mode, a dual heat exchange mode, an intermittent heat exchange mode and a low-load heat exchange mode.

[0075] Combine the following Figure 1The "one-to-many" air-conditioning model shown illustrates several optional working modes of the air-conditioning system shown in the embodiment of the present disclosure.

[0076] Figure 1 The air conditioning unit 100 of the air conditioning model shown has multiple indoor heat exchangers 110, and the heat exchange unit 200 has multiple radiation heat exchange devices; in this embodiment, at least one indoor heat exchanger 110 and at least one radiation heat exchange device 210 are used for heat exchange in the same indoor space, at least two indoor heat exchangers 110 are used for heat exchange in different indoor spaces, and at least two radiation heat exchange devices 210 are used for heat exchange in different indoor spaces. For the convenience of explanation, the multiple indoor heat exchangers 110 are defined as the first indoor heat exchanger 111, the second indoor heat exchanger 112, ..., the Nth indoor heat exchanger, and the multiple radiation heat exchange devices 210 are defined as the first radiation heat exchange device 211, the second radiation heat exchange device 212, ..., the Mth radiation heat exchange device.

[0077] In some embodiments, the first heat exchange mode of the air conditioning system corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump 230 is closed, and the first valve 271 and the second valve 272 are closed to use the indoor heat exchanger alone to exchange heat with the indoor air.

[0078] For example, Figure 2 As shown, it is assumed that the air conditioning system needs to heat two users (indoor spaces) in the same building, wherein the first indoor heat exchanger 111, the second indoor heat exchanger 112 and the first radiation heat exchange device 211 are arranged in the room of user 1, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are arranged in the room of user 2. When the air conditioning system operates in the first heat exchange mode, the circulation pump 230 is turned off, the second valve 272 corresponding to each radiation heat exchange device is turned off, and the switching valve 160 corresponding to each indoor heat exchanger is opened; the compressor 130 of the air conditioning unit 100 is controlled to be in the on state, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation loop is in the heating flow direction. At this time, each indoor heat exchanger acts as a "condenser" and releases heat to the indoor environment. The solid arrow in the figure shows the refrigerant flow direction in this mode. At this time, the radiation heat exchange device does not release heat to the indoor air.

[0079] The first heat exchange mode mainly changes the indoor ambient temperature through convection heat exchange, and has the advantages of timely startup and fast heat exchange rate. It is suitable for southern my country and some scenarios that do not require long-term cooling / heating.

[0080] In some embodiments, the second heat exchange mode of the air-conditioning system corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the indoor heat exchanger stops exchanging heat with the indoor air, the circulation pump 230 is turned on, and the first valve 271 and the second valve 272 are opened to use the indoor heat exchanger to supply cooling / heating to the radiation heat exchange device and the radiation heat exchange device exchanges heat with the indoor air.

[0081] For example, Figure 3 As shown, it is assumed that the air conditioning system needs to heat two users (indoor spaces) in the same building, wherein the first indoor heat exchanger 111, the second indoor heat exchanger 112 and the first radiation heat exchange device 211 are arranged in the room of user 1, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are arranged in the room of user 2. When the air conditioning system operates in the second heat exchange mode, the switching valve 160 and the first valve 271 corresponding to each indoor heat exchanger are opened, the indoor fan 150 corresponding to each indoor heat exchanger is closed, and the air guide plate of the indoor unit is closed to reduce the heat exchange between the indoor heat exchanger and the indoor air; the second valve 272 corresponding to each radiation heat exchange device is opened, and the circulation pump 230 and the balance valve 250 are opened; the compressor 130 of the air conditioning unit 100 is in the open state, and the valve direction of the four-way valve 140 is adjusted to make the first refrigerant circulation loop in the heating flow direction. At this time, each indoor heat exchanger acts as a "condenser" but does not release heat to the indoor environment. The solid arrow in the figure shows the refrigerant flow direction in this mode.

[0082] At the same time, the first medium channel and the second medium channel of the indoor heat exchanger exchange heat, transferring the heat of the refrigerant in the first medium channel to the medium in the second medium channel. Under the action of the circulation pump 230, the heat-exchanged medium flows into each radiation heat exchange device through the first valve 271 and the liquid distributor 241 in sequence. At this time, the temperature of each radiation heat exchange device itself is relatively high, releasing heat to the indoor environment. The dotted arrow in the figure shows the flow direction of the medium in this mode.

[0083] The second heat exchange mode mainly changes the indoor ambient temperature through radiant heat exchange, and has the advantages of stable heat exchange, comfort and energy saving. It is suitable for northern my country and some scenarios that require long-term heating.

[0084] In some embodiments, the dual heat exchange mode of the air conditioning system corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump 230 is turned on, and the first valve 271 and the second valve 272 are opened to use the indoor heat exchanger and the radiation heat exchange device to simultaneously exchange heat with the indoor air.

[0085] For example, Figure 4As shown, it is assumed that the air conditioning system needs to heat two users (indoor spaces) in the same building, wherein the first indoor heat exchanger 111, the second indoor heat exchanger 112 and the first radiation heat exchange device 211 are arranged in the room of user 1, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are arranged in the room of user 2. When the air conditioning system operates in the dual heat exchange mode, the switching valve 160 and the first valve 271 corresponding to each indoor heat exchanger are opened, the indoor fan 150 corresponding to each indoor heat exchanger is opened, and the air guide plate of the indoor unit is opened; the second valve 272 corresponding to each radiation heat exchange device is opened, and the circulation pump 230 and the balance valve 250 are opened; the compressor 130 of the air conditioning unit 100 is in the open state, and the valve direction of the four-way valve 140 is adjusted to make the first refrigerant circulation loop in the heating flow direction. At this time, each indoor heat exchanger acts as a "condenser" and can release heat to the indoor environment. The solid arrow in the figure shows the refrigerant flow direction in this mode.

[0086] At the same time, the first medium channel and the second medium channel of the indoor heat exchanger exchange heat, transferring the heat of the refrigerant in the first medium channel to the medium in the second medium channel. Under the action of the circulation pump 230, the heat-exchanged medium flows into each radiation heat exchange device through the first valve 271 and the liquid distributor 241 in sequence. At this time, the temperature of each radiation heat exchange device itself is relatively high, and heat is also released to the indoor environment. The dotted arrow in the figure shows the flow direction of the medium in this mode.

[0087] This dual heat exchange mode simultaneously utilizes the indoor heat exchanger for convective heat exchange and the radiation heat exchange device for radiation heat exchange. It can take into account the advantages of the first heat exchange mode and the second heat exchange mode mentioned above, has a wider range of applicable scenarios, and can meet the use requirements of various working conditions.

[0088] In some embodiments, the intermittent heat exchange mode of the air conditioning system has a first heat exchange state corresponding to a first time interval, and a second heat exchange state corresponding to a second time interval; and the set temperature of the first heat exchange state is greater than the set temperature of the second heat exchange state. The heat exchange requirements corresponding to different time intervals are different. The air conditioning system switches the corresponding heat exchange states in different time intervals to achieve alternating intermittent heat exchange with indoor air, so as to reduce the operating energy consumption of the air conditioning system under low heat exchange demand conditions while meeting the indoor temperature control requirements, thereby improving the energy saving effect of the air conditioning.

[0089] Optionally, the first heat exchange state corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump 230 is closed, and the first valve 271 and the second valve 272 are closed, so as to utilize the indoor heat exchanger to exchange heat with the indoor air; or, the first refrigerant circulation loop runs a cooling or heating cycle, the indoor heat exchanger stops exchanging heat with the indoor air, the circulation pump 230 is opened, and the first valve 271 and the second valve 272 are opened, so as to utilize the indoor heat exchanger to supply cooling / heating to the radiation heat exchange device and the radiation heat exchange device exchanges heat with the indoor air. The second heat exchange state corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump 230 is opened, and the first valve 271 and the second valve 272 are opened, so as to utilize the indoor heat exchanger and the radiation heat exchange device to simultaneously exchange heat with the indoor air.

[0090] For example, Figure 5a and 5b As shown, it is assumed that the air conditioning system needs to heat two users (indoor spaces) in the same building, wherein the first indoor heat exchanger 111, the second indoor heat exchanger 112 and the first radiation heat exchange device 211 are arranged in the room of user 1, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are arranged in the room of user 2. The first time interval is 9:00-18:00, and the set temperature of the first heat exchange state is 26°C; the first time interval is 18:00-8:00, and the set temperature of the second heat exchange state is 10°C.

[0091] When the current time is between 9:00-18:00, Figure 5a As shown, the switching valve 160 and the first valve 271 corresponding to each indoor heat exchanger are opened, the indoor fan 150 corresponding to each indoor heat exchanger is opened, and the air guide plate of the indoor unit is opened; the second valve 272 corresponding to each radiation heat exchange device is opened, and the circulation pump 230 and the balancing valve 250 are opened; the compressor 130 of the air-conditioning unit 100 is in the open state, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation loop is in the heating flow direction. At this time, each indoor heat exchanger acts as a "condenser" and can release heat to the indoor environment. In this first heat exchange state, the heat exchange rate between the air-conditioning system and the indoor air is relatively fast, which can meet the use requirements of maintaining a higher value of the set temperature. The solid arrow in the figure shows the refrigerant flow direction in this mode.

[0092] When the current time is between the second time interval 18:00-8:00, if Figure 5bAs shown, the switching valve 160 and the first valve 271 corresponding to each indoor heat exchanger are opened, the indoor fan 150 corresponding to each indoor heat exchanger is opened, and the air guide plate of the indoor unit is opened; the second valve 272 corresponding to each radiation heat exchange device is opened, and the circulation pump 230 and the balance valve 250 are opened; the compressor 130 of the air conditioning unit 100 is in the open state, and the valve direction of the four-way valve 140 is adjusted to make the first refrigerant circulation loop in the heating flow direction. At this time, each indoor heat exchanger acts as a "condenser" and can release heat to the indoor environment; at the same time, the first medium channel and the second medium channel of the indoor heat exchanger exchange heat, and the heat of the refrigerant in the first medium channel is transferred to the medium in the second medium channel. Under the action of the circulation pump 230, the heat-exchanged medium flows into each radiation heat exchange device through the first valve 271 and the liquid distributor 241 in turn. At this time, each radiation heat exchange device also releases heat to the indoor environment. The solid arrow in the figure shows the refrigerant flow direction in this mode, and the dotted arrow shows the medium flow direction in this mode.

[0093] Here, within the second time interval, by adjusting the compressor frequency, circulating pump operating speed, indoor fan speed and other component parameters of the air-conditioning unit 100, the heat exchange efficiency of the indoor heat exchanger and the radiation heat exchange device with the indoor air can be reduced so that the indoor environment can be maintained at a lower set temperature.

[0094] In this embodiment, by maintaining the indoor ambient temperature at a relatively small set temperature in the second time interval, the energy consumption of operating the air-conditioning system in the second time interval can be reduced, and the indoor ambient temperature can be quickly restored to a larger set temperature during the transition from the second time interval to the first time interval, thereby improving the response rate of temperature regulation of the air-conditioning system.

[0095] In some embodiments, in the low-load heat exchange mode of the air-conditioning system, the first refrigerant circulation loop runs a cooling or heating cycle, controls the indoor heat exchanger and / or radiation heat exchange device corresponding to at least one indoor space with heat exchange demand to exchange heat with the indoor air, and controls the indoor heat exchanger corresponding to at least one indoor space without heat exchange demand to supply energy to the second refrigerant circulation loop.

[0096] For example, Figure 6As shown, it is assumed that the air conditioning system needs to heat three users (indoor spaces) in the same building, wherein the first indoor heat exchanger 111 and the first radiation heat exchange device 211 are arranged in the room of user 1, the second indoor heat exchanger 112 and the second radiation heat exchange device 212 are arranged in the room of user 2, and the third indoor heat exchanger 113 and the third radiation heat exchange device 213 are arranged in the room of user 3. Among them, the rooms of user 1 and user 3 have heating demand, and the room of user 2 does not have heating demand. Since one of the users does not need heating during the holidays, the actual heating load of the air conditioning system is smaller than the full load state where all users need heating.

[0097] When the air conditioner is in the low-load heat exchange mode, convection heat exchange and radiation heat exchange are performed in the user 1 room. Specifically, the switching valve 160, the first valve 271 and the indoor fan 150 of the first indoor heat exchanger 111 corresponding to the user 1 room are opened, and the air guide plate of the indoor unit is opened; the second valve 272 corresponding to the first radiation heat exchange device 211 in the user 1 room is opened, and the circulation pump 230 is turned on; the compressor 130 of the air conditioning unit 100 is in the on state, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation loop is in the heating flow direction. At this time, the first indoor heat exchanger 111 acts as a "condenser" and can release heat to the indoor environment; at the same time, the first radiation heat exchange device 211 receives the heat transferred from the second refrigerant circulation loop, and also releases heat to the indoor environment.

[0098] No convection heat exchange and auxiliary heat exchange are performed on the user 2 room. Specifically, the switching valve 160 and the first valve 271 of the second indoor heat exchanger 112 corresponding to the user 2 room are opened, the indoor fan 150 is turned off, and the air guide plate of the indoor unit is closed to reduce the heat exchange of the second indoor heat exchanger 112 with the indoor environment; the second valve 272 corresponding to the second radiation heat exchange device 212 in the user 2 room is closed to reduce the heat exchange between the second radiation heat exchange device 212 and the indoor environment. In this embodiment, although the second indoor heat exchanger 112 is different from indoor heating, it is still enabled to exchange heat with the medium in the second refrigerant circulation loop, which can increase the heat exchange area between the air-conditioning unit 100 and the heat exchange unit 200, thereby facilitating the temperature control of other rooms with heat exchange requirements.

[0099] Auxiliary heat exchange is performed for user 3's room. Specifically, the switching valve 160 and the first valve 271 of the third indoor heat exchanger corresponding to user 3's room are opened, the indoor fan 150 is turned off, and the air guide plate of the indoor unit is closed to reduce the heat exchange of the third indoor heat exchanger 113 to the indoor environment; the second valve 272 corresponding to the third radiation heat exchange device 213 corresponding to user 3's room is opened, so that the third radiation heat exchange device 213 can receive the heat transferred from the second refrigerant circulation loop and release heat to the indoor environment.

[0100] It should be understood that the control methods of the various functional modes under the heating condition shown in the above embodiment are only for illustrative purposes and do not constitute limitations on their application to other conditions.

[0101] The air-conditioning system forms disclosed in the above-mentioned multiple embodiments can adapt to the differences in heat exchange demands between the northern and southern regions of my country, and can also meet the use requirements of different application scenarios such as intermittent or continuous heat exchange. It can take into account the rapid response of intermittent heating, as well as the thermal comfort and energy-saving advantages of long-term operation; and by configuring the indoor heat exchanger as a three-medium heat exchanger, it can not only realize separate convective heat exchange, but also be used to supply energy to the radiation heat exchange device for radiation heat exchange, which effectively simplifies the air-conditioning system and avoids energy quality loss caused by multi-stage heat exchange.

[0102] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air conditioning system with intermittent heat exchange function, characterized in that: include: An air conditioning unit (100) comprises an outdoor heat exchanger (120) and at least one indoor heat exchanger (110), wherein the indoor heat exchanger (110) is a three-medium heat exchanger; the outdoor heat exchanger (120) is connected to a first medium channel of the indoor heat exchanger (110) and is configured to form a first refrigerant circulation loop; A heat exchange unit (200) comprising at least one radiation heat exchange device (210); an internal pipeline of the radiation heat exchange device (210) is connected to a second medium channel of the indoor heat exchanger (110) and is configured to form a second refrigerant circulation loop, so that the indoor heat exchanger (110) can controllably supply energy to the radiation heat exchange device (210); At least one side of the second medium channel of each indoor heat exchanger (110) is provided with a first valve (271), at least one side of the internal pipeline of each radiation heat exchange device (210) is provided with a second valve (272), and the second refrigerant circulation loop is provided with a circulation pump (230), so that multiple functional modes can be realized by controlling the states of the circulation pump (230) and multiple valves.

2. The air conditioning system according to claim 1, characterized in that: The air conditioning system has a first heat exchange mode, which corresponds to the first refrigerant circulation loop running a refrigeration or heating cycle, the circulation pump (230) is closed, and the first valve (271) and the second valve (272) are closed to utilize the indoor heat exchanger (110) to exchange heat with the indoor air.

3. The air conditioning system according to claim 1, characterized in that: The air conditioning system has a second heat exchange mode, and the second heat exchange mode corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the indoor heat exchanger (110) stops exchanging heat with the indoor air, the circulation pump (230) is turned on, and the first valve (271) and the second valve (272) are opened to utilize the indoor heat exchanger (110) to supply cooling / heating to the radiation heat exchange device (210) and the radiation heat exchange device (210) exchanges heat with the indoor air.

4. The air conditioning system according to claim 1, characterized in that: The air conditioning system has a dual heat exchange mode, and the dual heat exchange mode corresponds to the first refrigerant circulation loop running a refrigeration or heating cycle, the circulation pump (230) is turned on, and the first valve (271) and the second valve (272) are opened to utilize the indoor heat exchanger (110) and the radiation heat exchange device (210) to simultaneously exchange heat with the indoor air.

5. The air conditioning system according to claim 1, characterized in that: The air conditioning system has an intermittent heat exchange mode, wherein the intermittent heat exchange mode has a first heat exchange state corresponding to a first time interval and a second heat exchange state corresponding to a second time interval; The first heat exchange state corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump (230) being closed, the first valve (271) and the second valve (272) being closed, so as to utilize the indoor heat exchanger (110) to exchange heat with the indoor air; or, the first refrigerant circulation loop running a cooling or heating cycle, the indoor heat exchanger (110) exchanging heat with the indoor air, the circulation pump (230) being opened, the first valve (271) and the second valve (272) being opened, so as to utilize the indoor heat exchanger (110) to supply cooling / heating to the radiation heat exchange device (210) and the radiation heat exchange device (210) to exchange heat with the indoor air; The second heat exchange state corresponds to the first refrigerant circulation loop running a cooling or heating cycle, the circulation pump (230) is turned on, and the first valve (271) and the second valve (272) are opened to utilize the indoor heat exchanger (110) and the radiation heat exchange device (210) to simultaneously exchange heat with the indoor air.

6. The air conditioning system according to any one of claims 1 to 5, characterized in that: The number of the indoor heat exchangers (110) is multiple and they are connected in parallel to the second refrigerant circulation loop, and the number of the radiation heat exchange devices (210) is multiple and they are connected in parallel to the second refrigerant circulation loop; At least one of the indoor heat exchangers (110) and at least one of the radiation heat exchange devices (210) are used for heat exchange in the same indoor space, at least two of the indoor heat exchangers (110) are used for heat exchange in different indoor spaces, and at least two of the radiation heat exchange devices (210) are used for heat exchange in different indoor spaces.

7. The air conditioning system according to claim 6, characterized in that: The air conditioning system has a low-load heat exchange mode. In the low-load heat exchange mode, the first refrigerant circulation loop runs a cooling or heating cycle, controls at least one indoor heat exchanger (110) and / or radiation heat exchange device (210) corresponding to an indoor space with a heat exchange demand to exchange heat with the indoor air, and controls at least one indoor heat exchanger (110) corresponding to an indoor space without a heat exchange demand to supply energy to the second refrigerant circulation loop.

8. The air conditioning system according to claim 6, characterized in that: The inflow side of the internal pipelines of the plurality of radiation heat exchange devices (210) is connected in parallel to the second refrigerant circulation loop via a liquid distributor (241), and the outflow side is connected in parallel to the second refrigerant circulation loop via a liquid collector (242); A bypass branch is also connected between the liquid distributor (241) and the liquid collector (242), and the bypass branch is provided with a balancing valve (250) for adjusting the hydraulic pressure between the liquid distributor (241) and the liquid collector (242).

9. The air conditioning system according to claim 8, characterized in that: The liquid separator (241) is also provided with a constant pressure device (260) for buffering the hydraulic pressure changes of the second refrigerant circulation loop.

10. The air conditioning system according to claim 1, characterized in that: The radiation heat exchange device (210) comprises a ceiling-type heat radiator, a wall-type heat radiator, a floor-type heat radiator or a liquid heat storage device.

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