CN220524224U - Air conditioning system with intermittent heat exchange function - Google Patents

Abstract

The application relates to intelligent household electrical appliances technical field discloses an air conditioning system with intermittent type heat transfer function, include: 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 communicated with a first medium channel of the indoor heat exchanger and is constructed into a first refrigerant circulation loop; a heat exchange unit comprising at least one radiant heat exchange device; the internal pipeline of the radiation heat exchange device is communicated with a second medium channel of the indoor heat exchanger and is constructed into a second refrigerant circulation loop; at least one side of a second medium channel of each indoor heat exchanger is provided with a first valve, at least one side of an internal pipeline of each radiation heat exchange device is provided with a second valve, a second refrigerant circulation loop is provided with a circulation pump, and a plurality of functional modes are realized by controlling states of the circulation pump and the valves. The air conditioning system of the embodiment of the disclosure is more suitable for various working condition demands, can effectively improve the operation energy efficiency, and simplifies the structure of the air conditioning system.

Description

Air conditioning system with intermittent heat exchange function

Technical Field

The application relates to the technical field of intelligent household appliances, for example, to an air conditioning system with an intermittent heat exchange function.

Background

The heat exchange end of the existing air conditioning system mainly comprises a convection end and a radiation end. The convection end can realize rapid cold and hot preparation, such as an air cooling heat exchange mode of an air conditioner; the radiation tail end can improve human comfort perception, such as a radiation heat exchange mode of floor heating. Based on the characteristics of the two types of terminals, certain differences exist in the heating modes of the corresponding systems: in the southern areas of China, direct expansion type convection terminals such as air conditioners are mostly adopted, and heating is performed according to an intermittent operation mode of starting and stopping according to requirements. The temperature rise at the starting stage is rapid, but the long-time blowing feel is obvious after stable operation, the comfort is poor, and the power consumption is high; in northern areas of China, radiation ends such as floor heating, radiators and the like are mostly adopted, and heating is performed in a continuous operation mode, so that the requirements of high comfort can be met, but the problems of long heating time, high energy consumption for overall operation and the like are caused. Today, where energy is increasingly intense, the intermittent heating mode of "people heating and people stopping heating" is undoubtedly energy-saving. But by sacrificing indoor thermal comfort, it is not desirable and long-term in exchange for energy savings.

At present, a heating air-conditioning mode combining advantages of two ends is that a refrigerant-water intermediate heat exchanger is independently arranged in a multi-split air-conditioning system, heat exchange is carried out by utilizing heat of the refrigerant and water, and the water after heat exchange is conveyed to the ends to exchange heat with an indoor environment; the main working mode is that the convection end of the multi-split air conditioning system is utilized for air cooling heat exchange during refrigeration, and the radiation end of the multi-split air conditioning system is utilized for radiation heat exchange during heating.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the specific heat capacity of the radiation end is large, so that the heat supply response speed is low, intermittent operation is difficult, and the actual operation energy consumption is high; and only a single tail end is utilized for indoor heat exchange under different working conditions, the multi-split air conditioning system can only operate in a continuous and single heating mode, and the respective advantages of convection and radiation tail ends can not be fully exerted; meanwhile, the related design needs to add an additional intermediate heat exchanger and a heat exchange pipeline, and the structural complexity and the manufacturing cost of the system are also increased.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides an air conditioning system with an intermittent heat exchange function, so as to solve the technical problems of single heating mode, high energy consumption, complex structure and the like of the existing air conditioning system integrating a convection end and a radiation end.

In some embodiments, an air conditioning system includes:

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 communicated with a first medium channel of the indoor heat exchanger and is constructed into a first refrigerant circulation loop;

a heat exchange unit comprising at least one radiant heat exchange device; the internal pipeline of the radiation heat exchange device is communicated with the second medium channel of the indoor heat exchanger and is configured into a second refrigerant circulation loop, so that the indoor heat exchanger can controllably supply energy to the radiation heat exchange device;

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, and a second refrigerant circulation loop is provided with a circulation pump, so that multiple functional modes are realized by controlling the states of the circulation pump and the valves.

In some embodiments, the air conditioning system has a first heat exchange mode corresponding to the first refrigerant circulation loop operating a refrigeration or heating cycle, the circulation pump being closed, the first valve and the second valve being closed to exchange heat with indoor air using the indoor heat exchanger.

In some embodiments, the air conditioning system has a second heat exchange mode corresponding to the first refrigerant circulation loop operating a refrigeration or heating cycle, the indoor heat exchanger ceasing heat exchange with indoor air, the circulation pump being on, the first valve and the second valve being on to utilize the indoor heat exchanger to supply cooling/heating to the radiant heat exchange device and heat exchange with indoor air by the radiant heat exchange device.

In some embodiments, the air conditioning system has a dual heat exchange mode corresponding to the first refrigerant circulation loop operating a refrigeration or heating cycle, the circulation pump being open, the first valve and the second valve being open to exchange heat with indoor air simultaneously using the indoor heat exchanger and the radiant heat exchange device.

In some embodiments, the air conditioning system has an 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;

the first heat exchange state corresponds to a first refrigerant circulation loop running refrigeration or heating cycle, the circulation pump is closed, and the first valve and the second valve are closed so as to exchange heat with indoor air by using the indoor heat exchanger; or the first refrigerant circulation loop runs refrigeration or heating circulation, the indoor heat exchanger stops exchanging heat with indoor air, the circulation pump is started, and the first valve and the second valve are started so as to supply cold/heat to the radiation heat exchange device by using the indoor heat exchanger and exchange heat between the radiation heat exchange device and the indoor air;

the second heat exchange state corresponds to the first refrigerant circulation loop running refrigeration or heating cycle, the circulation pump is started, and the first valve and the second valve are started so as to exchange heat with indoor air simultaneously by using the indoor heat exchanger and the radiation heat exchange device.

In some embodiments, the number of indoor heat exchangers is plural and connected in parallel with the second refrigerant circulation loop, and the number of radiation heat exchange devices is plural and connected in parallel with the second refrigerant circulation loop;

at least one indoor heat exchanger and at least one radiation heat exchange device are used for exchanging heat with the same indoor space, at least two indoor heat exchangers are respectively used for exchanging heat with different indoor spaces, and at least two radiation heat exchange devices are respectively used for exchanging heat with different indoor spaces.

In some embodiments, the air conditioning system has a low load heat exchange mode in which the first refrigerant circulation loop operates a refrigeration or heating cycle, controls at least one indoor heat exchanger and/or radiant heat exchange device corresponding to an indoor space having heat exchange requirements to exchange heat with indoor air, and controls at least one indoor heat exchanger corresponding to an indoor space not having heat exchange requirements to energize the second refrigerant circulation loop.

In some embodiments, the inflow side of the internal pipeline of the plurality of radiation heat exchange devices is connected in parallel with the second refrigerant circulation loop through a liquid separator, and the outflow side is connected in parallel with the second refrigerant circulation loop through a liquid trap;

a bypass branch is further connected between the liquid separator and the liquid collector, and is provided with a balance valve for adjusting the hydraulic pressure between the liquid separator and the liquid collector.

In some embodiments, the liquid separator is further provided with a constant pressure device for buffering the hydraulic pressure variation of the second refrigerant circulation circuit.

In some embodiments, the radiant heat exchange device comprises a ceiling-based heat radiator, a wall-based heat radiator, a floor-based heat radiator, or a liquid heat reservoir.

The air conditioning system with the intermittent heat exchange function provided by the embodiment of the disclosure can realize the following technical effects:

the air conditioning system provided by the embodiment of the disclosure comprises an air conditioning unit and a heat exchange unit, wherein an indoor heat exchanger of the air conditioning unit can perform convection heat exchange, a radiation heat exchange device of the heat exchange unit can perform radiation heat exchange, one or two of two heat exchange modes can be conveniently selected according to different requirements through controlling a circulating pump and a valve, so that the heat exchange mode of the air conditioning system is more suitable for the requirements of working conditions, and the running energy efficiency is further effectively improved; meanwhile, the indoor heat exchanger is used for supplying energy to the radiation heat exchange device, so that the structural complexity of an air conditioning system can be reduced, an additional intermediate heat exchanger is not required, and the production and manufacturing cost is saved.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic diagram of an air conditioning system provided in an embodiment of the present disclosure;

FIG. 2 is a schematic diagram illustrating operation of an air conditioning system in a first heat exchange mode provided by an embodiment of the present disclosure;

FIG. 3 is a schematic diagram illustrating operation of an air conditioning system in a second heat exchange mode provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an air conditioning system according to an embodiment of the present disclosure in a dual heat exchange mode;

FIG. 5a is a schematic diagram illustrating operation of an air conditioning system according to an embodiment of the present disclosure in a first heat exchange state in an intermittent heat exchange mode;

FIG. 5b is a schematic diagram illustrating operation of the air conditioning system according to an embodiment of the present disclosure in a second heat exchange state in an intermittent heat exchange mode;

fig. 6 is a schematic diagram illustrating an operation of an air conditioning system according to an embodiment of the present disclosure in a light load heat exchange mode.

Reference numerals:

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

200. A heat exchange unit; 210. a radiation heat exchange device; 211. a first radiant heat exchange device; 212. a second radiant heat exchange device; 213. a third radiant heat exchange device; 220. an auxiliary heating pipeline; 230. a circulation pump; 241. a knockout; 242. a liquid collector; 250. a balancing valve; 260. a constant pressure device; 271. a first valve; 272. and a second valve.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

In some alternative embodiments, as shown in connection with fig. 1, the air conditioning system with intermittent heat exchange function basically includes an air conditioning unit 100 and a heat exchange unit 200. The air conditioning unit 100 may be used for performing convection heat exchange with an indoor environment through components such as an indoor heat exchanger, so as to achieve functions of refrigeration, heating, and the like; the heat exchange unit 200 is mainly used for performing radiation heat exchange with the indoor environment through a radiation heat exchange device, and can also be used for realizing functions of refrigeration, heating and the like.

The components of the air conditioning unit 100 mainly include an indoor heat exchanger 110, an outdoor heat exchanger 120, a compressor 130, a throttle device (not shown), a four-way valve 140, and the like.

Here, the body of the air conditioning unit 100 includes two major parts, i.e., an indoor unit and an outdoor unit, wherein the indoor unit is disposed at an indoor side, and an indoor heat exchanger 110 and an indoor fan 150 are disposed in the indoor unit, and are used for performing heat exchange between a refrigerant and an indoor environment under the driving of wind power of the indoor fan 150, so as to absorb indoor heat for refrigeration or release heat for heating; the outdoor unit is provided outside, and the compressor 130, the outdoor heat exchanger 120, the four-way valve 140, and the like are provided in the outdoor unit.

The components of the air conditioning unit 100 are connected by refrigerant lines and are configured as a first refrigerant circulation circuit, and the interior is filled with a refrigerant capable of circulating along the first refrigerant circulation circuit, thereby realizing heat transfer between the indoor side and the outdoor side.

Optionally, the number of indoor heat exchangers 110 is one or more; in the present disclosure and the following embodiments, a "one-to-multiple" air conditioner model is taken as an example to describe, an indoor unit of the air conditioner has a plurality of indoor heat exchangers 110, for example, an air conditioner unit 100 shown in fig. 1 is provided with N indoor heat exchangers 110, N indoor heat exchangers 110 are connected in parallel, and each parallel branch is provided with a switching valve 160, where the switching valve 160 can be used to control the on-off state of each parallel branch, so as to control the specifically activated indoor heat exchanger.

Alternatively, the switching valve 160 is disposed at the outflow side or inflow side of each parallel branch line at the indoor heat exchanger 110, and as shown in fig. 1, the switching valve 160 is disposed at the inflow side (refrigerant flow direction) of the indoor heat exchanger 110.

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, configured to enable any two or three of the three medium channels to exchange heat.

Wherein, the first medium channel is used for communicating with the refrigerant pipeline corresponding to the first refrigerant circulation loop of the air conditioning unit 100, and the second medium channel is used for communicating with the second refrigerant circulation loop; the third medium channel is communicated with the internal air channel of the indoor unit. Thus, the refrigerant in the first refrigerant circulation loop, the medium circulated in the second refrigerant circulation loop and the air in the air duct inside the indoor unit can realize mutual heat exchange in the three-medium heat exchanger.

Illustratively, the three-medium heat exchanger is used for heat exchange between the refrigerant flowing through the first medium channel and the medium flowing through the second medium channel, such as heating the medium by using a high-temperature refrigerant or cooling the medium by using a low-temperature refrigerant; or, the medium flowing through the second medium channel is subjected to heat exchange with the air flowing through the third medium channel by utilizing the three-medium heat exchanger, such as heating the air by utilizing a high-temperature medium or cooling the air by utilizing a low-temperature medium; or, the three-medium heat exchanger is used for enabling the refrigerant flowing through the first medium channel to exchange heat with the medium flowing through the second medium channel and the air flowing through the third medium channel, such as heating the medium and the air simultaneously by using the high-temperature refrigerant or cooling the medium and the air simultaneously by using the low-temperature refrigerant.

In this embodiment, the switching valve 160 is disposed on the corresponding pipeline of 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.

In some alternative embodiments, the heat exchange unit 200 mainly includes a radiation heat exchange device 210 and an auxiliary heat pipe 220, where an internal pipe of the radiation heat exchange device is connected to a second medium channel of the indoor heat exchanger 110 through the auxiliary heat pipe 220 and is configured as a second refrigerant circulation loop, so that the indoor heat exchanger 110 can controllably supply energy to the radiation heat exchange device 210, including supplying cold or heat, where a medium in the second refrigerant circulation loop is a carrier of the cold or heat, and the radiation heat exchange device 210 can exchange heat with an external environment by using a medium flowing through the radiation heat exchange device 210, for example, when a low-temperature medium flows through the radiation heat exchange device 210, the radiation heat exchange device 210 can perform a function of cooling indoor refrigeration; when the medium and high temperature medium flows through the radiation heat exchange device 210, the radiation heat exchange device 210 can perform the function of heating and raising the temperature indoors.

In some embodiments, the second refrigerant circulation circuit is further provided with a circulation pump 230, and the circulation pump 230 is configured to controllably drive the medium to circulate along the second refrigerant circulation circuit, so that the circulation pump 230 can be used to provide driving force for circulating the medium in the second refrigerant circulation circuit in this embodiment.

Optionally, in combination with the foregoing embodiment, the second medium channels of each of the plurality of indoor heat exchangers 110 of the air conditioning unit 100 are connected to the auxiliary heat pipe 220 in parallel, and each parallel branch is provided with a first valve 271, where the first valve 271 can be used to control the on-off state of the second medium channel corresponding to each parallel branch, so as to control whether the first medium channel and the second medium channel in each indoor heat exchanger 110 exchange heat.

In an embodiment, the first valve 271 is disposed at an inflow side of the second medium passage of each indoor heat exchanger 110 under the medium circulation flow defined by the circulation pump 230.

With reference to the embodiment shown in fig. 1, the liquid inlet ends of the second medium channels corresponding to the indoor heat exchangers 110 are connected in parallel to each other and connected to the auxiliary heat pipe 220, and the liquid outlet ends are connected in parallel to each other and connected to the auxiliary heat pipe 220; thus, when the second refrigerant circulation loop works, the medium is split to the corresponding indoor heat exchangers 110 along each parallel branch to perform heat exchange respectively, and then the medium after heat exchange with the refrigerant is recombined into the auxiliary heat pipeline 220.

In this embodiment, for the above-mentioned "one-to-many" air conditioning mode, each indoor heat exchanger 110 corresponds to different indoor spaces, and because there may be a difference in the heat exchange temperatures set by the different indoor heat exchangers 110 and an influence of different real-time temperatures corresponding to the indoor spaces, the heat quantity of each indoor heat exchanger 110 that can be used for heat exchange with the medium also varies, by virtue of the above-mentioned parallel structure design, not only the heat exchange unit 200 can concentrate as much heat quantity as possible for a plurality of indoor heat exchangers, but also the medium from the different indoor heat exchangers 110 can be mixed, so that the temperature of the medium that is ultimately used for radiation heat exchange is more uniform.

Alternatively, the number of the radiation heat exchanging devices of the heat exchanging unit 200 in this embodiment is plural, that is, the plural indoor heat exchangers 110 supply cold/heat to the plural radiation heat exchanging devices 210.

Each radiation heat exchange device is connected to the auxiliary heat pipe 220 in parallel, and a second valve 272 is respectively arranged on each parallel branch, and the second valve 272 can be used for controlling the on-off state of the internal pipe of the radiation heat exchange device 210 corresponding to each parallel branch, so as to control whether each radiation heat exchange device 210 exchanges heat with indoor air; the liquid inlet interfaces corresponding to the radiation heat exchange devices 210 are connected in parallel with the auxiliary heat pipeline 220, and the liquid outlet interfaces are connected with the auxiliary heat pipeline 220; thus, when the second refrigerant circulation loop works, the medium is first shunted to the corresponding radiation heat exchange device 210 along each parallel branch to perform radiation heat exchange respectively, and then is recombined with the medium subjected to heat exchange with the external environment to enter the auxiliary heat pipeline 220 again.

In some embodiments, the heat exchange unit 200 further includes a liquid separator 241 and a liquid trap 242 for connecting corresponding parallel branches of the plurality of radiant heat exchange devices 210 in parallel with the auxiliary heat pipe 220. In an embodiment, the inflow side of the internal piping of the plurality of radiant heat exchange devices 210 is connected in parallel to the auxiliary heat pipe 220 through the liquid separator 241, and the outflow side is connected in parallel to the auxiliary heat pipe 220 through the liquid trap 242.

Alternatively, the knockout 241 has a knockout main pipe as the medium inflow end of the knockout 241 and a plurality of knockout branches as the medium outflow end of the knockout 241. Here, the liquid separation main pipe is connected with the auxiliary heat pipe 220; the number of the liquid-dividing branch pipes is matched with the number of the radiation heat exchange devices 210, and parallel branch pipes corresponding to the radiation heat exchange devices 210 are connected to the liquid-dividing branch pipes in a one-to-one correspondence manner.

Optionally, the liquid trap 242 has a main liquid collecting pipe as the medium outflow end of the liquid separator 241 and a plurality of liquid collecting branches as the medium inflow end of the liquid separator 241. Here, the liquid collecting main pipe is connected with the auxiliary heat pipe 220; the number of the liquid collecting branch pipes is matched with the number of the radiation heat exchange devices 210, and parallel branch pipes corresponding to the radiation heat exchange devices 210 are connected to the liquid collecting branch pipes in a one-to-one correspondence mode.

In some embodiments, a bypass branch is further connected between the liquid separator 241 and the liquid collector 242, and the bypass branch can be communicated with a medium flow path inside the liquid separator 241 and the liquid collector 242; the bypass branch is provided with a balancing valve 250 for regulating the hydraulic pressure between the dispenser 241 and the collector 242.

In this way, when the medium pressure in either the liquid separator 241 or the liquid trap 242 is too high, the balance valve 250 is turned on, and a part of the medium can be guided to the other via the bypass branch, so that the problem of damage due to the excessive pressure can be avoided by dispersing the liquid pressure.

In some embodiments, the liquid separator 241 is further provided with a constant pressure device 260 for buffering the hydraulic pressure variation of the second refrigerant circulation circuit.

Optionally, the constant pressure device 260 is a constant pressure tank, and the defining tank can provide a volume-variable space for volume changes generated by medium cold and hot temperature changes in the flow path; here, the operating principle of the constant pressure tank is: when the medium with pressure outside enters the constant pressure tank, the nitrogen sealed in the tank is compressed, so that part of the tank volume occupied by the original gas can be emptied, and the medium is filled into the part of the volume until the pressure of the gas in the tank is consistent with the pressure of the medium; when the pressure of the medium is reduced (the pressure of the gas in the tank is higher than the hydraulic pressure of the medium), the medium in the tank is extruded out of the tank again by the expansion of the gas, so that part of the medium is returned to the second refrigerant circulation loop to participate in circulation.

In some embodiments, the radiant heat exchange device 210 includes at least one or more of a ceiling-based heat radiator, a wall-based heat radiator, a floor-based heat radiator, or a liquid heat reservoir.

Alternatively, the type of medium is water or ethylene glycol, etc.

In various embodiments of the present disclosure, various functional modes of the air conditioning system can be realized by controlling states of the circulation pump 230 and the plurality of valves such as the first valve 271, the second valve 272, and the like; here, the functional modes of the air conditioning system include at least a first heat exchange mode, a second heat exchange mode, a double heat exchange mode, an intermittent heat exchange mode, and a light load heat exchange mode.

Several alternative modes of operation of the air conditioning system shown in the embodiments of the present disclosure are described below in connection with the "one-to-many" air conditioner model shown in fig. 1.

The air conditioner type air conditioning unit 100 shown in fig. 1 has a plurality of indoor heat exchangers 110, and the heat exchanging unit 200 has a plurality of radiation heat exchanging devices; in this embodiment, at least one indoor heat exchanger 110 and at least one radiation heat exchange device 210 are used for exchanging heat with the same indoor space, at least two indoor heat exchangers 110 are respectively used for exchanging heat with different indoor spaces, and at least two radiation heat exchange devices 210 are respectively used for exchanging heat with different indoor spaces. For convenience of explanation, the plurality of indoor heat exchangers 110 are defined herein as a first indoor heat exchanger 111, a second indoor heat exchanger 112, … …, and an nth indoor heat exchanger, respectively, and the plurality of radiant heat exchange devices 210 are defined herein as a first radiant heat exchange device 211, a second radiant heat exchange device 212, … …, and an mth radiant heat exchange device, respectively.

In some embodiments, the first heat exchange mode of the air conditioning system corresponds to the first refrigerant cycle operating a refrigeration or heating cycle, the circulation pump 230 is closed, and the first valve 271 and the second valve 272 are closed to exchange heat with indoor air using the indoor heat exchanger alone.

For example, as shown in fig. 2, 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 disposed in the user 1 room, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are disposed in the user 2 room. When the air conditioning system operates in the first heat exchange mode, the circulating pump 230 is closed, the second valve 272 corresponding to each radiation heat exchange device is closed, 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 an on state, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation circuit is in a heating flow direction, and at this time, each indoor heat exchanger acts as a "condenser" to release heat to the indoor environment, and the solid arrows in the figure show the refrigerant flow direction in this mode. At this time, the radiation heat exchange device does not release heat with indoor air.

The first heat exchange mode mainly changes the indoor environment temperature through convection heat exchange, has the advantages of timely starting, high heat exchange rate and the like, and is suitable for southern areas in China and some scenes without long-time refrigeration/heating.

In some embodiments, the second heat exchange mode of the air conditioning system corresponds to the first refrigerant cycle operating a refrigeration or heating cycle, the indoor heat exchanger stops exchanging heat with indoor air, the circulation pump 230 is opened, and the first valve 271 and the second valve 272 are opened to supply/supply heat to and from the radiant heat exchange device with indoor air using the indoor heat exchanger.

For example, as shown in fig. 3, 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 disposed in the user 1 room, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are disposed in the user 2 room. When the air conditioning system operates in the second heat exchange mode, switching valves 160 and first valves 271 corresponding to the indoor heat exchangers are opened, indoor fans 150 corresponding to the indoor heat exchangers are closed, and an indoor unit air deflector is closed so as to reduce heat exchange between the indoor heat exchangers and indoor air; opening the corresponding second valve 272 of each radiation heat exchange device, and opening the circulation pump 230 and the balance valve 250; the compressor 130 of the air conditioning unit 100 is turned on, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation circuit is in the heating flow direction, and at this time, each indoor heat exchanger functions as a "condenser" but does not release heat to the indoor environment. The solid arrows in the figure show the refrigerant flow direction in this mode.

Meanwhile, the first medium channel and the second medium channel of the indoor heat exchanger exchange heat, the heat of the refrigerant in the first medium channel is transferred to the medium in the second medium channel, and under the action of the circulating pump 230, the medium after heat exchange flows into each radiation heat exchange device through the first valve 271 and the liquid separator 241 in sequence, and at the moment, the temperature of each radiation heat exchange device is higher, and the heat is released to the indoor environment. The dashed arrows in the figure show the medium flow in this mode.

The second heat exchange mode mainly changes the indoor environment temperature through radiation type heat exchange, has the advantages of stable heat exchange, comfort, energy conservation and the like, and is suitable for northern areas of China and some scenes needing long-time heating.

In some embodiments, the dual heat exchange mode of the air conditioning system corresponds to the first refrigerant circulation loop operating a refrigeration or heating cycle, the circulation pump 230 is turned on, and the first valve 271 and the second valve 272 are turned on to exchange heat with indoor air simultaneously using the indoor heat exchanger and the radiant heat exchange device.

For example, as shown in fig. 4, 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 disposed in the user 1 room, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are disposed in the user 2 room. When the air conditioning system operates in the double heat exchange mode, switching valves 160 and first valves 271 corresponding to the indoor heat exchangers are opened, indoor fans 150 corresponding to the indoor heat exchangers are opened, and an air deflector of the indoor unit is opened; opening the corresponding second valve 272 of each radiation heat exchange device, and opening the circulation pump 230 and the balance valve 250; the compressor 130 of the air conditioning unit 100 is turned on, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation circuit is in the heating flow direction, and at this time, each indoor heat exchanger functions as a "condenser" and can release heat to the indoor environment. The solid arrows in the figure show the refrigerant flow direction in this mode.

Meanwhile, the first medium channel and the second medium channel of the indoor heat exchanger exchange heat, the heat of the refrigerant in the first medium channel is transferred to the medium in the second medium channel, and under the action of the circulating pump 230, the medium after heat exchange flows into each radiation heat exchange device through the first valve 271 and the liquid separator 241 in sequence, and at the moment, the temperature of each radiation heat exchange device is higher, and the heat is released to the indoor environment. The dashed arrows in the figure show the medium flow in this mode.

The dual heat exchange mode simultaneously utilizes the indoor heat exchanger to perform convection heat exchange and the radiation heat exchange device to perform radiation heat exchange, can take the advantages of the first heat exchange mode and the second heat exchange mode into account, has wider application scene and can meet the use requirements of various working conditions.

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 realizes alternate intermittent heat exchange with indoor air by switching corresponding heat exchange states in different time intervals, so that on the premise of meeting the indoor temperature regulation and control requirements, the operation energy consumption of the air conditioning system under the working condition of low heat exchange requirements is reduced, and the energy saving effect of the air conditioner is improved.

Optionally, the first heat exchange state 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 exchange heat with indoor air using the indoor heat exchanger; alternatively, the first refrigerant circulation loop operates a refrigerating or heating cycle, the indoor heat exchanger stops exchanging heat with indoor air, the circulation pump 230 is opened, and the first valve 271 and the second valve 272 are opened to supply cold/heat to the radiation heat exchanging device by using the indoor heat exchanger and exchange heat with indoor air by the radiation heat exchanging device. The second heat exchange state corresponds to the first refrigerant circulation loop operating a refrigerating or heating cycle, the circulation pump 230 is turned on, and the first valve 271 and the second valve 272 are turned on to exchange heat with indoor air simultaneously using the indoor heat exchanger and the radiation heat exchange device.

By way of example, as shown in fig. 5a and 5b, 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 disposed in the user 1 room, and the third indoor heat exchanger 113 and the second radiation heat exchange device 212 are disposed in the user 2 room. The first time interval is 9:00-18:00, and the set temperature of the first heat exchange state is 26 ℃; the first time interval is 18:00-8:00, and the set temperature of the second heat exchange state is 10 ℃.

When the current moment is between 9:00 and 18:00 of the first moment, as shown in fig. 5a, switching valves 160 and first valves 271 corresponding to the indoor heat exchangers are opened, indoor fans 150 corresponding to the indoor heat exchangers are opened, and an air deflector of the indoor unit is opened; opening the corresponding second valve 272 of each radiation heat exchange device, and opening the circulation pump 230 and the balance valve 250; the compressor 130 of the air conditioning unit 100 is turned on, and the valve direction of the four-way valve 140 is adjusted so that the first refrigerant circulation circuit is in the heating flow direction, and at this time, each indoor heat exchanger functions as a "condenser" and can release heat to the indoor environment. In the first heat exchange state, the heat exchange rate of the air conditioning system and the indoor air is relatively high, and the use requirement of maintaining a set temperature with a high value can be met. The solid arrows in the figure show the refrigerant flow direction in this mode.

When the current time is between 18:00 and 8:00 of the second time interval, as shown in fig. 5b, switching valves 160 and first valves 271 corresponding to the indoor heat exchangers are opened, indoor fans 150 corresponding to the indoor heat exchangers are opened, and an air deflector of the indoor unit is opened; opening the corresponding second valve 272 of each radiation heat exchange device, and opening the circulation pump 230 and the balance valve 250; the compressor 130 of the air conditioning unit 100 is in an on state, and the valve direction of the four-way valve 140 is adjusted to enable the first refrigerant circulation loop to be in a heating flow direction, so that each indoor heat exchanger plays a role of a condenser at the moment and can release heat to the indoor environment; meanwhile, the first medium channel and the second medium channel of the indoor heat exchanger exchange heat, the heat of the refrigerant in the first medium channel is transferred to the medium in the second medium channel, and under the action of the circulating pump 230, the medium after heat exchange flows into each radiation heat exchange device through the first valve 271 and the liquid separator 241 in sequence, and at this time, each radiation heat exchange device releases heat to the indoor environment. The solid arrows in the figure show the refrigerant flow direction in this mode, and the broken arrows show the medium flow direction in this mode.

Here, in the second time interval, by adjusting the component parameters such as the compressor frequency, the operation rate of the circulation pump, the rotation speed of the indoor fan, etc. of the air conditioning unit 100, the heat exchange efficiency with the indoor air of the indoor heat exchanger, the radiation heat exchange device can be reduced, so that the indoor environment can be kept at the set temperature with a lower value.

In this embodiment, by keeping the indoor environment temperature at the set temperature with a relatively small value in the second time interval, the energy consumption of operating the air conditioning system in the second time interval can be reduced, the indoor environment temperature can be quickly restored to a larger set temperature in the transition process from the second time interval to the first time interval, and the response rate of the temperature adjustment of the air conditioning system is improved.

In some embodiments, in a light load heat exchange mode of the air conditioning system, the first refrigerant circulation loop operates a refrigeration or heating cycle, controls at least one indoor heat exchanger and/or a radiation heat exchange device corresponding to an indoor space with a heat exchange requirement to exchange heat with indoor air, and controls at least one indoor heat exchanger corresponding to an indoor space without a heat exchange requirement to supply energy to the second refrigerant circulation loop.

By way of example, as shown in fig. 6, 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 disposed in the user 1 room, the second indoor heat exchanger 112 and the second radiation heat exchange device 212 are disposed in the user 2 room, and the third indoor heat exchanger 113 and the third radiation heat exchange device 213 are disposed in the user 3 room. Wherein, user 1 room and user 3 room have heating requirements, and user 2 room does not have heating requirements. Since one of the users is on the false side and does not need heating, the actual heating load of the air conditioning system is smaller than the full load state in which the entire users need heating.

And in the small-load heat exchange mode of the air conditioner, the room 1 is subjected to heat convection and radiation. Specifically, the switching valve 160, the first valve 271 and the indoor fan 150 of the first indoor heat exchanger 111 corresponding to the room of the user 1 are opened, and the indoor unit air deflector is opened; opening a second valve 272 corresponding to the first radiation heat exchange device 211 in the room 1 of the user, and opening the circulating pump 230; the compressor 130 of the air conditioning unit 100 is in an on state, and the first indoor heat exchanger 111 acts as a "condenser" at this time by adjusting the valve direction of the four-way valve 140 so that the first refrigerant circulation circuit is in a heating flow direction, so that heat can be released to the indoor environment; meanwhile, the first radiation heat exchange device 211 receives the heat transferred from the second refrigerant circulation loop, and simultaneously releases heat to the indoor environment.

No convection heat exchange and no auxiliary heat exchange are performed for the room of the user 2. Specifically, the switching valve 160 and the first valve 271 of the second indoor heat exchanger 112 corresponding to the room of the user 2 are opened, the indoor fan 150 is closed, and the indoor unit air deflector is closed, so as to reduce heat exchange of the second indoor heat exchanger 112 to the indoor environment; the second valve 272 corresponding to the second radiant heat exchange device 212 in the room of the user 2 is closed to reduce the heat exchange between the second radiant heat exchange device 212 and the indoor environment. In this embodiment, the second indoor heat exchanger 112 is still activated for heat exchange with the medium in the second refrigerant circulation loop, so as to increase the heat exchange area of the air conditioning unit 100 and the heat exchange unit 200, thereby facilitating the temperature regulation of other rooms with heat exchange requirements.

And carrying out auxiliary heat exchange on the room of the user 3. Specifically, the switching valve 160 and the first valve 271 of the third indoor heat exchanger corresponding to the room of the user 3 are opened, the indoor fan 150 is closed, and the air deflector of the indoor unit is closed, so that heat exchange of the third indoor heat exchanger 113 to the indoor environment is reduced; and opening a second valve 272 corresponding to the third radiation heat exchange device 213 in the room of the user 3, so that the third radiation heat exchange device 213 can receive the heat transferred by the second refrigerant circulation loop and release heat to the indoor environment.

It should be appreciated that the manner in which the functional modes are operated during the heating operation described in the above embodiments is merely exemplary and is not intended to limit the application to other operation.

The air conditioning system disclosed by the embodiments can adapt to the difference of heat exchange requirements in the north-south areas of China, can also meet the use requirements of different application scenes such as intermittent or continuous heat exchange, can give consideration to the rapid response of intermittent heating and the advantages of thermal comfort and energy conservation in long-term operation; and by configuring the indoor heat exchanger as a three-medium heat exchanger, not only can separate convection heat exchange be realized, but also the indoor heat exchanger can be used for supplying energy to the radiation heat exchange device for radiation heat exchange, so that the air conditioning system is effectively simplified, and the energy grade loss caused by multi-stage heat exchange is avoided.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the 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 (10)

1. An air conditioning system having an intermittent heat exchange function, comprising:

an air conditioning unit (100) comprising an outdoor heat exchanger (120) and at least one indoor heat exchanger (110), and the indoor heat exchanger (110) is a three-medium heat exchanger; the outdoor heat exchanger (120) is communicated with a first medium channel of the indoor heat exchanger (110) and is constructed into a first refrigerant circulation loop;

a heat exchange unit (200) comprising at least one radiant heat exchange device (210); the internal pipeline of the radiation heat exchange device (210) is communicated with a second medium channel of the indoor heat exchanger (110) and is configured into a second refrigerant circulation loop so as to enable the indoor heat exchanger (110) to controllably supply energy to the radiation heat exchange device (210);

Wherein, 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), thereby realizing multiple functional modes by controlling the states of the circulation pump (230) and the valves.

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

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

4. The air conditioning system according to claim 1, characterized in that it has a double heat exchange mode, which corresponds to the first refrigerant circulation circuit operating a refrigeration or heating cycle, the circulation pump (230) being open, the first valve (271) and the second valve (272) being open for simultaneous heat exchange with indoor air using the indoor heat exchanger (110) and the radiant heat exchange device (210).

5. The air conditioning system of claim 1, wherein the air conditioning system has an 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;

wherein the first heat exchange state 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 exchange heat with indoor air by the indoor heat exchanger (110); or, the first refrigerant circulation loop runs a refrigeration or heating cycle, the indoor heat exchanger (110) exchanges heat with indoor air, the circulation pump (230) is opened, and the first valve (271) and the second valve (272) are opened so as to supply cold/heat to the radiation heat exchange device (210) by using the indoor heat exchanger (110) and exchange heat with the indoor air by the radiation heat exchange device (210);

The second heat exchange state corresponds to the first refrigerant circulation loop running refrigeration or heating cycle, the circulation pump (230) is turned on, and the first valve (271) and the second valve (272) are turned on to exchange heat with indoor air simultaneously by using the indoor heat exchanger (110) and the radiation heat exchange device (210).

6. The air conditioning system according to any of claims 1 to 5, wherein the number of indoor heat exchangers (110) is plural and connected in parallel to the second refrigerant circulation circuit, and the number of radiant heat exchange devices (210) is plural and connected in parallel to the second refrigerant circulation circuit;

at least one indoor heat exchanger (110) and at least one radiation heat exchange device (210) are used for exchanging heat with the same indoor space, at least two indoor heat exchangers (110) are respectively used for exchanging heat with different indoor spaces, and at least two radiation heat exchange devices (210) are respectively used for exchanging heat with different indoor spaces.

7. Air conditioning system according to claim 6, characterized in that the air conditioning system has a light load heat exchange mode in which the first refrigerant cycle operates a refrigeration or heating cycle, controlling at least one indoor heat exchanger (110) and/or a radiant heat exchange device (210) corresponding to an indoor space having heat exchange requirements to exchange heat with indoor air, and controlling at least one indoor heat exchanger (110) corresponding to an indoor space not having heat exchange requirements to energize the second refrigerant cycle.

8. The air conditioning system according to claim 6, wherein an inflow side of an internal pipe of the plurality of radiant heat exchangers (210) is connected in parallel to the second refrigerant circulation circuit through a liquid separator (241), and an outflow side is connected in parallel to the second refrigerant circulation circuit through a liquid trap (242);

a bypass branch is further connected between the liquid separator (241) and the liquid collector (242), and a balance valve (250) is arranged on the bypass branch and used for adjusting the hydraulic pressure between the liquid separator (241) and the liquid collector (242).

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

10. An air conditioning system according to claim 1, characterized in that the radiant heat exchange device (210) comprises a ceiling-based heat radiator, a wall-based heat radiator, a floor-based heat radiator or a liquid heat reservoir.