CN107676902B - Air conditioning system - Google Patents

Abstract

The application provides an air conditioning system, this air conditioning system includes: the fresh air module comprises a compressor, a condenser and an evaporator which are in fluid connection, and the evaporator is used for regulating and controlling the temperature and/or the humidity of fresh air; and the flow path of the temperature module is in heat exchange with the flow path of the fresh air module but is not communicated with the flow path of the fresh air module, the temperature module is used for regulating and controlling the temperature of a use side, and the temperature module comprises: the heat exchanger is used for exchanging heat with the fresh air module; a heat radiator connected to the heat exchanger to form a closed flow path; a pump connected in series in the closed flow path; wherein the fresh air module comprises a bidirectional flash evaporator connected to the condenser, the evaporator and the heat exchanger respectively. According to the air conditioning system, the temperature and the humidity can be independently controlled on the basis of energy conservation.

Description

Air Conditioning System

technical field

The present application relates to the field of environment, and in particular, to an air conditioning system capable of controlling temperature and humidity relatively independently.

Background technique

At present, people have higher and higher requirements for living or living environment, so more and more spaces are equipped with multi-connected air conditioning systems to improve people's comfort in the activity space. In order to obtain higher environmental comfort, it is not only necessary to regulate the temperature of the environment, but also to regulate the humidity of the environment. Therefore, for the air-conditioning system, how to independently control the temperature and humidity has become a technical problem that needs to be solved.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a technical solution capable of independently regulating temperature and humidity.

In order to achieve the purpose of the present application, an air conditioning system is provided, the air conditioning system includes: a fresh air module, the fresh air module includes a fluidly connected compressor, a condenser and an evaporator, the evaporator is used to control the temperature and/or humidity of the fresh air and a temperature module, the flow path of the temperature module is heat exchanged with the flow path of the fresh air module but is not connected, the temperature module is used to regulate and control the temperature of the use side, and the temperature module includes: heat exchange a heat exchanger, the heat exchanger is used for heat exchange with the flow path of the fresh air module passing through the heat exchanger; a heat radiator, the heat radiator is located in the use side and connected with the heat exchanger to form a closed The pump, the pump is connected in series in the closed flow path; wherein the fresh air module includes a bidirectional flasher, and the bidirectional flasher includes: a first connection pipe, the first connection pipe is communicated with the condenser and extends into the lower part of the flash evaporator; a second connecting pipe, the second connecting pipe communicates with the evaporator and extends into the lower part of the flash evaporator; and a first connection port and a second connection port, the first connection port Located at the lower part of the flash evaporator, the second connection port is located at the upper part of the flash evaporator, the first connection port is connected to the water inlet of the heat exchanger through a first one-way valve, and the heat exchanger The water outlet is connected to the second connection port through a solenoid valve.

Preferably, the temperature module includes a fresh air processor, which is connected in parallel with the heat radiator for regulating the temperature and/or humidity of the fresh air.

Preferably, a regulating valve is connected in series with the fresh air processor and/or the heat exchanger.

Preferably, the compressor includes a first compressor and a second compressor connected in series, and the first compressor and the second compressor are respectively connected with a four-way valve to selectively supply the condenser or the evaporator to the Transport fluid media.

Preferably, the upper part of the bidirectional flasher is provided with a gas phase outlet, and the gas phase outlet is connected to the flow path between the first compressor and the second compressor.

Preferably, the condenser and the evaporator are respectively connected with first and third throttle valves in series.

Preferably, the air conditioning system includes a heat exchange bypass, which is connected in parallel with the evaporator and passes through the heat exchanger to enable heat exchange.

Preferably, a second check valve and/or a second throttle valve are connected in series in the heat exchange bypass.

Preferably, in the flow direction of the fresh air, the fresh air processor and the evaporator are sequentially arranged from upstream to downstream.

In the technical solution of the present application, since the fresh air module is mainly responsible for the regulation of temperature and/or humidity, and the temperature module that is not connected to the fresh air module is used for the regulation of temperature, the two are relatively independent. Therefore, the temperature module can realize For the temperature adjustment on the use side, the fresh air module can adjust the humidity (and/or temperature) of the fresh air, and the temperature module and the fresh air module are relatively independent, so that the offset of cold and heat can be eliminated and the performance of the unit can be improved.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

1a is a schematic diagram of a connection structure of an air conditioning system according to Embodiment 1 of the present application;

Fig. 1b is a schematic diagram of the operation of the air conditioning system shown in Fig. 1a under summer conditions;

Fig. 1c is a pressure-enthalpy diagram showing the change of refrigerant state during operation under summer conditions;

Fig. 1d is a schematic diagram of the operation of the air-conditioning system shown in Fig. 1a under winter conditions;

Fig. 1e is a pressure-enthalpy diagram showing the change of refrigerant state during operation under winter conditions;

2a is a schematic diagram of a connection structure of an air-conditioning system according to Embodiment 2 of the present application;

Fig. 2b is a schematic diagram of the operation of the air conditioning system shown in Fig. 2a under summer conditions;

Fig. 2c is a schematic diagram of the operation of the air conditioning system shown in Fig. 2a under winter conditions;

3a is a schematic diagram of a connection structure of an air conditioning system according to Embodiment 3 of the present application;

Fig. 3b is a schematic diagram of the operation of the air conditioning system shown in Fig. 3a under a summer working condition;

Fig. 3c is a schematic diagram of the operation of the air conditioning system shown in Fig. 3a under winter conditions;

4a is a schematic diagram of a connection structure of an air-conditioning system according to Embodiment 4 of the present application;

Fig. 4b is a schematic diagram of the operation of the air conditioning system shown in Fig. 4a under summer conditions;

Fig. 4c is a schematic diagram of the operation of the air conditioning system shown in Fig. 4a under winter conditions;

Figure 4d is a schematic diagram of another embodiment according to the present application.

Detailed ways

Specific embodiments of the present application are described in detail below. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in each embodiment may be combined with each other.

As shown in the accompanying drawings, the present application provides an air-conditioning system, the air-conditioning system includes: a fresh air module, the fresh air module includes a fluidly connected compressor, a condenser 11 and an evaporator 12, the evaporator 12 is used for cooling the fresh air temperature and/or humidity are regulated; and a temperature module, the flow path of the temperature module is in heat exchange with the flow path of the fresh air module but not in communication, the temperature module is used for regulating the temperature of the user side.

The fresh air module is used to introduce the purified outdoor fresh air into the room, so as to keep the indoor air with sufficient cleanliness. In order to ensure good comfort in the indoor environment, the temperature and/or humidity of the incoming fresh air (flow of fresh air) is regulated by means of a fresh air module (as an air conditioner) mainly comprising a compressor, a condenser and an evaporator. Of course, in order to realize the function of air conditioner, the fresh air module may also include other auxiliary components, such as throttle valve, refrigerant storage, etc., which will not be described in detail here, but can be realized by referring to the composition structure and operation principle of traditional air conditioners. Due to the air conditioning function of the fresh air module, the temperature and/or humidity of the fresh air can be regulated, especially the humidity of the fresh air can be regulated, thereby realizing the regulation of the humidity in the space.

At the same time, the technical solution of the present application is also provided with a temperature module, which mainly controls the temperature on the user side. The flow path of the temperature module and the flow path of the fresh air module are not connected but can exchange heat with each other, so as to prevent the use of heat. Regulation of temperature in side space. The so-called user side refers to the space where the temperature and/or humidity is to be regulated, such as building spaces, conference rooms and other places where people live and move, especially room(s) and/or end(s) in the space.

In the traditional air conditioning system, in order to meet the requirements of dehumidification, the evaporation temperature needs to be lowered; on the other hand, in order to meet the temperature requirements, it is necessary to increase the supply air temperature through reheating. In this way, not only the performance of the air-conditioning system is degraded due to the lower evaporating temperature, but also the phenomenon of cold and heat offset occurs, which wastes energy.

In the technical solution of the present application, since the fresh air module is mainly responsible for the regulation of temperature and/or humidity, and the temperature module that is not connected to the fresh air module is used for the regulation of temperature, the two are relatively independent. Therefore, the temperature module can To achieve a higher evaporating temperature to adjust the temperature, the fresh air module can achieve a low evaporating temperature for humidity (and/or temperature) adjustment to eliminate the cold and heat offset phenomenon and improve the performance of the unit. That is to say, in the technical solution of the present application, independent control of temperature and humidity can be realized on the basis of energy saving.

Each module of the air conditioning system of the present application will be described in detail below.

1. Temperature module

As shown in the drawings, the temperature module includes: a heat exchanger 20 for exchanging heat with the flow path of the fresh air module passing through the heat exchanger; a heat radiator 21 , the heat radiator 21 is located in the use side and is connected with the heat exchanger 20 to form a closed flow path; a pump 22 is connected in series in the closed flow path.

The heat exchanger 20 can be a suitable heat exchanger, such as a plate heat exchanger, selected according to the working conditions. In the heat exchanger 20, the flow path of the fresh air module and the flow path of the temperature module are arranged adjacent to each other, but are not in communication, thereby realizing heat exchange. Therefore, hereinafter, when describing the fresh air module and referring to the heat exchanger 20, it can generally be understood that the fresh air module passes through the flow path of the heat exchanger 20; when describing the temperature module and referring to the heat exchanger 20, it can be understood that the temperature module passes through The flow path of the heat exchanger. Of course, the heat exchanger 20 here refers to an integral device for realizing heat exchange.

The pump 22 is used to provide driving force to the refrigerant in the flow path of the temperature module (the refrigerant can be a cooling/heating agent, and the same can be understood for the refrigerant below), so that the fluid in the flow path of the temperature module can be driven The medium, such as refrigerant or water, remains fluid in a predetermined state. On the one hand, heat exchange can be performed with the flow path of the fresh air module through the heat exchanger 20 , and on the other hand, the heat-exchanged medium can flow to the heat radiator 20 . As for the pump 22, a pump device with suitable industrial parameters can be selected according to the working conditions, such as a gear pump, a plunger pump, and the like.

The heat radiator 21 is located in the use side. Since the heat radiator, the pump and the heat exchanger 20 are connected to form a closed flow path, when the heat exchanged medium flows to the heat radiator 20, it can pass through the heat radiator. The device 20 controls the temperature of the space on the use side, which can not only increase the temperature in the use side, but also decrease the temperature in the use side, so as to reach a predetermined temperature level. The heat radiator 20 may be a cold radiant ceiling or a dry fan coil unit or the like.

In the flow path of the temperature module, in order to control the operating parameters of the temperature module through the flow state of the medium, a valve device for realizing throttling or switching can be provided. Alternatively, the flow rate of the pump 22 can also be adjusted.

As mentioned above, the main function of the fresh air device is to control the temperature and/or humidity of the fresh air, but in a preferred case, a temperature module can also be used to control the temperature of the fresh air. As shown in the drawings, the temperature module includes a fresh air processor 23, which is connected in parallel with the heat radiator 21 for regulating the temperature and/or humidity of the fresh air.

Since the fresh air processor 23 is connected in parallel with the heat radiator 12, after the heat exchange, the medium flows to the heat radiator 21 in one way, so as to regulate the temperature of the user side; temperature is regulated. Then the two mediums converge and flow to the pump 22 again. Preferably, in order to adapt the temperature module to different working conditions, as shown in the drawings, the fresh air processor 23 and/or the heat exchanger 20 are connected in series with a regulating valve. The fresh air processor 23 may be a surface cooler or a radiator or the like. Through the cooperation of the valves in the air conditioning system, the temperature modules can be relatively independent.

The connection relationship and basic operation process of the temperature module are described in detail above. The operation process under different working conditions will also be described in detail below with reference to the accompanying drawings.

2. Fresh air module

As mentioned above, the main function of the fresh air module is to control the temperature and/or humidity of the fresh air by using the air conditioner. In the technical solution of the present application, in addition to using the traditional air conditioner, different implementations are provided for the fresh air module, as shown in various drawings. The traditional air conditioning device will not be described in detail here, and different embodiments of the fresh air module and corresponding different embodiments of the entire air conditioning system will be described in detail below with reference to the accompanying drawings. In addition, it should be pointed out that the above-mentioned temperature module is applicable to all the following embodiments.

2.1 Embodiment 1

1a to 1e describe the technical solution of the first embodiment.

As shown in Figure 1a, Figure 1b and Figure 1d, the fresh air module includes a compressor, a condenser 11 and an evaporator 12 that are fluidly connected, and the so-called fluid connection means that they can achieve direct and/or indirect fluid interaction with each other. In Embodiment 1, the fresh air module further includes a two-way flasher 13, and the two-way flasher 13 includes: a first connecting pipe 131, the first connecting pipe 131 is communicated with the condenser 11 and extends into the flasher 13 lower part; a second connection pipe 132, the second connection pipe 132 communicates with the evaporator 12 and extends into the lower part of the flash evaporator 13; and a first connection port 133 and a second connection port 134, the first connection port 133 is located at the lower part of the flasher 13 , the second connection port 134 is located at the upper part of the flasher 13 , and the first connection port 133 is connected to the water inlet of the heat exchanger 20 through a first one-way valve 139 , and the water outlet of the heat exchanger 20 is connected to the second connection port 134 through the solenoid valve 140 .

The so-called bidirectional means that both the first connecting pipe and the second connecting pipe can be used as the input pipe and the output pipe, so the refrigerant medium can be conveyed in two directions through the first connecting pipe and the second connecting pipe.

When the liquid refrigerant medium under a certain pressure enters the two-way flasher 13 through one of the first connecting pipe and the second connecting pipe, flash evaporation occurs due to the change of pressure, so that it forms at the top of the inner cavity of the two-way flasher 13. The medium is vapor, while the bottom is accumulating medium liquid. Subsequently, the liquid medium flows out of the bidirectional flasher through the other of the first connecting pipe and the second connecting pipe.

For the first connection port 133 located in the lower part, the liquid medium can be led to the heat exchanger 20 through the first non-return valve 139 via the first connection port 133 . After the heat exchange between the heat exchanger and the flow path of the temperature module is completed, it will return to the bidirectional flasher through the second connection port 134 . As shown in FIGS. 1 a and 1 b , a solenoid valve 140 is connected in series with the second connection port 134 to control the on-off of the flow path at the second connection port 134 . The first one-way valve 139 only allows the liquid medium to flow out of the two-way flasher 13 and does not allow fluid flow to the two-way flasher. The functions of the valve 140 and the first one-way valve 139 can also satisfy that the flow path of the first embodiment is suitable for different working conditions, which will be described in detail below.

There may be one or more compressors, but preferably, as shown in Figures 1a, 1b and 1d, the compressors include a first compressor 101 and a second compressor 102 connected in series, the first compressor 101 and the second compressor 102 are respectively connected with a four-way valve, so as to selectively deliver a fluid medium (such as heat carrier/refrigerant) to the condenser 11 or the evaporator 12 .

The function of the four-way valve is that, under different working conditions, the first compressor and the second compressor connected in series can use the four-way valve to deliver pressure medium to the condenser 11 or the evaporator 12 . For example, when performing refrigeration work, the medium from the evaporator 12 needs to be compressed and then sent to the condenser 11; and when performing heating work, the medium from the condenser 11 needs to be compressed and then sent to the evaporator 12. . The different operating modes will be described in detail below. The four-way valve can choose a common structural form, which will not be described in detail here.

The first compressor and the second compressor can be selected according to the working conditions, and the compressors within the appropriate industrial parameter range can be selected. Preferably, the first compressor and the second compressor have different industrial parameters, such as volume, flow, suction pressure, discharge pressure, and the like. Preferably, the rated power of the first compressor is greater than the rated power of the second compressor.

Using the design of double compressors, the refrigerant medium can be easily compressed to more physical states, so as to obtain good working results.

Preferably, as shown in Figures 1a and 1b, the upper part of the bidirectional flasher 13 is provided with a gas phase outlet 135, the gas phase outlet 135 is connected to the flow path between the first compressor 101 and the second compressor 102, As a result, gaseous medium can be supplemented into the main flow path under predetermined circumstances.

Preferably, as shown in Figures 1a and 1b, the condenser 11 and the evaporator 12 are respectively connected in series with a first throttle valve EEV1 and a third throttle valve EEV3. The function of the throttle valve is to control the flow of the refrigerant medium, and at the same time, it can adjust the physical state of the refrigerant medium, such as the pressure of the refrigerant medium, so as to adjust the enthalpy.

Preferably, the air conditioning system includes a heat exchange bypass, and the heat exchanger 20 is connected in series in the heat exchange bypass, so that the heat exchanger 20 is connected to the evaporator 12 in parallel. Further preferably, a second check valve 136 and/or a second throttle valve EEV2 are connected in series in the heat exchange bypass to control the flow direction and flow of the refrigerant medium.

The working principle of the technical solution of Embodiment 1 under different working conditions is described below.

2.1.a Summer conditions

In summer working conditions, the main function is to control the temperature and humidity independently, which not only meets the setting requirements of the indoor environment, but also improves the performance of the system and reduces energy consumption. Wherein, the use side in the system may be multiple rooms and multiple ends.

As shown in Figures 1b and 1c, the low pressure refrigerant gas is first compressed to the intermediate state point 2 through the second compressor 102, and then mixed with the refrigerant gas at the intermediate pressure (state point 6') from the bidirectional flasher to the state point 3. Compressed by the first compressor to state point 4, and output high temperature and high pressure refrigerant gas.

The high-temperature and high-pressure refrigerant gas passes through the condenser 11 and is condensed into a high-pressure refrigerant liquid, which is throttled to the intermediate state point 6 through the EEV1 and enters the bidirectional flasher 13 .

In the bidirectional flasher 13, the refrigerant gas of the intermediate pressure is collected in the upper part, and the refrigerant liquid of the intermediate pressure is collected in the lower part. The refrigerant liquid in the lower part of the bidirectional flasher is divided into two parts: one part supplies liquid to the heat exchanger 20 through the first connection port 133 through the first one-way valve 139 by means of gravity liquid supply, and the liquid is supplied to the heat exchanger 20 at a higher evaporation temperature ( Intermediate temperature) to prepare high-temperature cold water, and the saturated refrigerant gas generated after evaporation flows back to the two-way flasher 13 through the second connection port 134; another secondary throttle through the throttle valve EEV3 enters the evaporator 12 ( Indoor unit heat exchanger), dehumidifies the outdoor fresh air at a lower evaporating temperature, and then returns to the compressor through the four-way valve.

The medium-pressure refrigerant gas in the upper half of the bidirectional flasher is supplemented to the compressor to be compressed into a high-temperature and high-pressure gaseous refrigerant.

A part of the high-temperature cold water produced by the heat exchanger 20 flows to the fresh air processor 23 for reheating and dehumidified fresh air, and the other part enters the indoor heat radiator 21 to cool the room. Room and/or multiple ends work simultaneously.

It can be seen from the above description that in the summer working conditions, the temperature module is used to produce high-temperature cold water, and the heat radiator is supplied to cool the room; at the same time, the evaporator 12 is used to dehumidify the outdoor fresh air. Therefore, the dual evaporating temperature is used to realize the independent control of temperature and humidity, which essentially realizes the performance improvement of the air conditioning system (such as the multi-line refrigeration system).

2.1.b Winter conditions

In winter conditions, the main function of the air conditioning system is to quickly make the indoor temperature meet the heating set requirements and improve the user's comfort experience. At the same time, the operation performance of the air conditioning system can be improved.

As shown in Figures 1d and 1e, the low pressure refrigerant gas is first compressed to the intermediate state point 2 through the first compressor 101, and then mixed with the intermediate pressure (state point 6') refrigerant gas from the bidirectional flasher to the state point 3 , and then compressed to the state point 4 by the second compressor 102, and the high-temperature and high-pressure refrigerant gas is discharged.

The high temperature and high pressure refrigerant gas is divided into two streams: one is used to preheat the fresh air entering the room to state point 5, and then is throttled to state point 6 through EEV3; The hot water reaches the state point 5, and then is throttled to the state point 6 through the throttle valve EEV2, mixed with the other refrigerant, and then enters the two-way flasher 13.

The upper part of the bidirectional flasher 13 collects refrigerant gas of intermediate pressure, and the lower part collects refrigerant liquid of intermediate pressure. The medium-pressure refrigerant gas in the upper half is supplemented to the compressor through the pipeline as an intermediate gas supplement for the two-stage compression. The refrigerant liquid in the two-way flash evaporator enters the condenser 11 for evaporation after being throttled twice by the throttle valve EEV1, and then returns to the compressor to complete a cycle.

A small part of the prepared heating hot water flows to the fresh air processor 23 for reheating the outdoor fresh air, and the other part enters the indoor heat radiator 21, which can quickly make the temperature in the room meet the heating requirement.

It can be seen from the above description that the air-conditioning system in Embodiment 1 first performs fluorine-air heat exchange and water-air heat exchange through the evaporator, such as a fan coil, to preheat the fresh air, so that the fresh air entering the room is at a higher temperature; The heat radiator 21 directly heats the indoor air at the radiation end, so that the indoor temperature can be reached quickly. Compared with the traditional only using conventional radiant heating, the time from the start of the system operation to the indoor heating requirement is greatly shortened. Moreover, it can be seen from the operating principle of winter conditions that its cycle is a single condensing temperature and evaporation temperature, but because it adopts a two-stage compression system, compared with the conventional single-stage compression, the pressure ratio is reduced, thereby increasing the system performance.

2.2 Embodiment 2

2a to 2c describe the technical solution of Embodiment 2 of the present application.

As shown in FIGS. 2 a to 2 c , the compressor 30 is connected with a four-way valve to selectively deliver fluid medium to the condenser 11 or the evaporator 12 . Similar to Embodiment 1, the function of the four-way valve is to enable the compressor to use the four-way valve to deliver pressure medium to the condenser 11 or the evaporator 12 under different working conditions.

In the second embodiment, when the compressor 30 is transporting to the condenser 11, the heat exchanger 20 is connected in parallel with the evaporator 12; In the case of delivery, the compressor is connected to the condenser 11 through the heat exchanger 20 , and the evaporator 12 is connected in parallel with the flow path between the heat exchanger 20 and the condenser 11 .

When the compressor 30 delivers the high-pressure refrigerant medium to the condenser 11, the condensed medium passes through the heat exchanger 20 for heat exchange, so that the medium in the temperature module is in a desired physical state. At the same time, through the treatment of the evaporator 12, the fresh air can be dehumidified. When the compressor 30 delivers the medium to the evaporator 12, the pressure medium first passes through the heat exchanger 20 for heat exchange treatment to meet the requirements of the temperature module. A part of the medium flowing out of the heat exchanger 20 flows to the condenser 11, and the other part flows to the evaporator 12 to control the temperature and/or humidity of the fresh air. The above conditions will be described in detail below.

As shown in FIG. 2a to FIG. 2c, preferably, a reheater 14 is connected in series upstream of the evaporator 12, and the reheater 14 is used to regulate the temperature of the fresh air, so that the reheater 14 can be used to make the fresh air more efficient. For precise temperature control. Preferably, in order to make the technical solution of Embodiment 2 applicable to different working conditions, as shown in the figure, the upstream of the reheater 14 is connected in series with only the fluid from the condenser 11 to flow to the reheater and the Two upstream one-way valves 137, 137' that only allow fluid from the heat exchanger 20 to flow to the reheater, downstream of the evaporator 12 are connected in series only to allow fluid to flow from the evaporator 12 to the reheaters, respectively. Two downstream check valves 138, 138' of the compressor and condenser. The flow direction of the refrigerant medium can be controlled by using the above two pairs of one-way valves, thereby allowing the system to be suitable for different working conditions.

Preferably, a first throttle valve EEV1 and a third throttle valve EEV3 are connected in series with the heat exchanger 20; and/or a second throttle valve EEV2 is connected in series upstream of the evaporator 12 to control the flow of the refrigerant medium. flow and flow. Also preferably, the flow path between the evaporator 12 and the reheater 14 and the flow path between the first and third throttle valves EEV1 , EEV3 are connected through a valve 141 as shown. Through the control of the valve 141, the air conditioning system can selectively perform the dehumidification function.

The connection structure of the second embodiment is described in detail above, and the working principle of the technical solution of the second embodiment under different working conditions is described below.

2.2.a Summer conditions

As shown in Figure 2b, the high-temperature and high-pressure refrigerant discharged from the compressor 30 passes through the four-way valve and enters the condenser 11 (outdoor air-cooled heat exchanger) to cool down into a low-temperature and high-pressure liquid, and then is divided into two paths: one path of low-temperature and high-pressure refrigerant liquid It enters the reheater 14 through an upstream one-way valve 137 to heat the dehumidified fresh air. After the refrigerant is throttled and expanded by the throttle valve EEV2, it enters the evaporator 12 to cool and dehumidify the outdoor fresh air. The gaseous refrigerant flows back to the compressor through the four-way valve and through a downstream check valve 138; the excess refrigerant flows through the valve 141 along the bypass pipe (through the solenoid valve 2) and flows into the outlet end of the first throttle valve EEV1. After the other refrigerant is mixed with the refrigerant flowing into the outlet end of the first throttle valve EEV1, it is expanded and throttled through EEV3, and then enters the heat exchanger 20, so as to exchange heat with the temperature control module to produce high-temperature cold water for supplying fresh air. The unit pre-cools the fresh air through the fresh air processor 23, and realizes the cooling of the indoor end through the heat radiator 21. Subsequently, the other refrigerant also flows back to the compressor through the four-way valve to complete a cycle.

The on-off of the valve 141 (such as a solenoid valve) is used to switch the dehumidification mode and the non-dehumidification mode, and the opening degree adjustment of the first throttle valve EEV1 is used to adjust the refrigerant passing through the reheater 14 and the refrigerant on the main road. flow to meet different reheat requirements.

It can be seen from the above description that under summer working conditions, high-temperature cold water is directly prepared by the heat exchanger 20 for indoor radiant cooling; the low-temperature evaporator is used to exchange heat with fluorine air to dehumidify the outdoor fresh air. To achieve independent control of temperature and humidity, the system energy consumption is relatively low.

2.2.b Winter conditions

In the technical solution of Embodiment 2, there are two sub-modes in winter working conditions: a heating and dehumidifying mode and a heating-only mode.

1) Heating and dehumidifying mode

The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 30 enters the heat exchanger 20 through the four-way valve, and produces low-temperature hot water for heating through heat exchange.

The condensed high-pressure liquid refrigerant is divided into two paths: one refrigerant enters the reheater 14 through the other upstream one-way valve 137', and the dehumidified fresh air is heated, and the subcooling degree of the refrigerant is further increased; then , a part of the refrigerant is collected to the outlet pipeline of the third throttle valve EEV3 through the bypass of the valve 141, and a part of the refrigerant enters the evaporator 12 to cool and dehumidify the outdoor fresh air after being throttled and expanded by the second throttle valve EEV2 , and returns to the outlet of the first throttle valve EEV1 through another downstream one-way valve 138 ′, and merges with the gas-liquid two-phase refrigerant in the main circuit throttled by the first throttle valve EEV1 . At the same time, the other high-pressure liquid refrigerant flowing out of the heat exchanger 20 is slightly decompressed by the third throttle valve EEV3, mixed with the refrigerant bypassed by the reheater, and then expanded through the first throttle valve EEV1 throttling, and then mixed with the gaseous refrigerant returned from the dehumidification evaporator 12 through another downstream one-way valve 138', and then enters the condenser 12 (outdoor side air-cooled heat exchanger), and then passes through the four-way valve and the gas-liquid separator. , return to the compressor to complete a cycle.

Among them, adjusting the third throttle valve EEV3 with different opening degrees can adjust the flow of the refrigerant passing through the reheater 14 and the refrigerant on the main road, so as to meet different reheating requirements. Through the heat exchanger 20, the hot water for heating prepared by the temperature module is divided into two routes, one route is transported to the heat radiator 21, so as to directly adjust the temperature of the end; the other route is transported to the fresh air processor 23 ( surface cooler) to preheat the fresh air.

2) Separate heating mode

The second throttle valve EEV2 and valve 141 are closed, while the third throttle valve EEV3 is kept fully open. At this time, since the second throttle valve EEV2 is closed, no refrigerant flows through the evaporator 12, and thus there is no dehumidification function. Moreover, at this time, only low-temperature hot water can be used to heat the fresh air in the fresh air processor 23 (surface cooler). When the second throttle valve EEV2 is closed and the valve 141 is opened, the high-pressure refrigerant in a supercooled state can be used to further heat the fresh air through the reheater 14 .

It can be seen from the above description that in winter mode, the technical solution of Embodiment 2 can not only preheat the fresh air, but also directly heat the indoor air at the radiant end by using the heat radiator 21, so that the indoor temperature can quickly reach the required temperature.

2.3 Embodiment 3

Figures 3a to 3c describe the technical solution of the third embodiment.

As shown in FIGS. 3 a to 3 c , the compressor 30 is connected with a four-way valve to selectively deliver fluid medium to the condenser 11 or the evaporator 12 . Similarly, the function of the four-way valve is to enable the compressor to use the four-way valve to deliver pressure medium to the condenser 11 or the evaporator 12 under different working conditions. In the third embodiment, the condenser 11 and the heat exchanger 20 are connected in series, the evaporator 12 is connected in parallel with the series-connected condenser 11 and the heat exchanger 20, and the inlet of the evaporator 12 is connected to the The flow path between the discharge port of the compressor 30 and the four-way valve.

Preferably, as shown in the figure, a reheater 14 is connected in series upstream of the evaporator 12 , and the reheater 14 is used to control the temperature of the fresh air, so that the temperature of the fresh air can be regulated more flexibly.

As shown in the figure, a valve 142 is connected in series upstream of the reheater 14; and/or a second throttle valve EEV2 is connected in series between the reheater 14 and the evaporator 12, so on the one hand, it is possible to control the flow of the refrigerant medium. The flow rate is regulated, and at the same time, the technical solution of the third embodiment can be adapted to different working conditions, which will be described in detail below. Further preferably, the condenser 11 is connected in series with a first throttle valve EEV1, and the heat exchanger 20 is connected with a third throttle valve EEV3 in series.

The connection structure of the third embodiment is described in detail above, and the working principle of the technical solution of the third embodiment under different working conditions is described below.

2.3.a Summer conditions

In summer conditions, the first throttle valve EEV1 is fully opened. The high temperature and high pressure refrigerant discharged from the compressor 30 is divided into two paths, one path enters the four-way valve, and the other path (bypass branch) goes to the reheater 14 to reheat the dehumidified air. The refrigerant flow (ie, reheat) of the bypass branch is regulated by a valve 142 (eg, a solenoid valve). After passing through the reheater 14, the refrigerant passes through the expansion and throttling of the second throttle valve EEV2, and then enters the dehumidification evaporator 12 to cool and dehumidify the outdoor fresh air. The high-temperature and high-pressure refrigerant entering the four-way valve enters the condenser 11 for cooling and becomes a low-temperature high-pressure liquid. After the expansion and throttling of the third throttle valve EEV3, it enters the heat exchanger 20 to produce high-temperature cold water. Finally, the two refrigerants are collected before the gas-liquid separator, and then enter the compressor 30 to complete a cycle.

In the temperature module, a part of the prepared high-temperature cold water is bypassed to the surface cooler to preheat the fresh air, and the other part enters the heat radiator 21 to adjust the indoor temperature at the end.

It can be seen from the above description that under summer operating conditions, the heat exchanger can directly prepare high-temperature cold water for indoor radiant cooling; meanwhile, the low-temperature evaporator 12 dehumidifies the outdoor fresh air by exchanging heat with fluorine air. Therefore, the independent control of temperature and humidity can be realized, and the energy consumption of the system is relatively low.

2.3.b Winter conditions

In winter conditions, when dehumidification is required, the third throttle valve EEV3 is fully opened. Before entering the four-way valve, the high temperature and high pressure refrigerant discharged from the compressor is bypassed all the way to the reheater 14 to reheat the dehumidified air. The refrigerant flow (ie, reheat) of the bypass branch is adjusted by the valve 142, and after being expanded and throttled by the second throttle valve EEV2, it enters the dehumidification evaporator 12 to cool and dehumidify the outdoor fresh air.

Another high-temperature and high-pressure refrigerant passes through the four-way valve and enters the heat exchanger to produce hot water for heating. After the expansion and throttling of the first throttle valve EEV1, it enters the condenser 11 and becomes a low-pressure gaseous refrigerant. Before the gas-liquid separator, it is collected with the refrigerant of the dehumidification evaporator and returned to the compressor. one cycle.

In winter conditions, when separate heating is required, both the second throttle valve EEV2 and the valve 142 are closed, and no refrigerant passes through the reheater 14 and the evaporator 12 . At this time, only the high-temperature and high-pressure refrigerant undergoes heat exchange through the heat exchanger 20 to produce hot water for heating.

Since the reheater and the evaporator are used as the equipment for dehumidifying the fresh air, the biggest difference from the VRV system on the market is that the high-pressure gas pipe that can be connected from the compressor discharge port can pass through the reheating without going through the four-way valve. The low-pressure gas pipe connected to the suction port of the compressor after the evaporator and the evaporator, so that it can meet the dehumidification needs in winter and summer. At the same time, this solution greatly reduces the use of valves, simplifies control, and makes the system easier to implement.

It can be seen from the above description that in winter mode, the technical solution of Embodiment 3 can not only preheat the fresh air, but also directly heat the indoor air at the radiation end by using the heat radiator 21, so that the indoor temperature can quickly reach the required temperature.

In addition, the selection of the dehumidification function can be realized by the cooperation of the valve 142 and the second throttle valve EEV2.

2.4 Embodiment 4

4a to 4c describe the technical solution of Embodiment 4 of the present application.

As shown in FIGS. 4 a to 4 c , the compressor 30 is connected with a four-way valve to selectively deliver fluid medium to the condenser 11 or the evaporator 12 . Similar to Embodiment 1, the function of the four-way valve is to enable the compressor to use the four-way valve to deliver pressure medium to the condenser 11 or the evaporator 12 under different working conditions.

In the fourth embodiment, the inlet of the evaporator 12 is connected to the flow path between the condenser 11 and the heat exchanger 20 , and the outlet of the evaporator 20 is connected to the suction of the compressor 30 . mouth. Therefore, when the compressor 30 delivers the medium to the condenser 11, the medium flowing through the condenser 11 will be split to the evaporator 12 and the heat exchanger 20; and when the compressor 30 delivers the medium to the heat exchanger 20, the medium will split to evaporator 12 and condenser 11. This condition will be described in more detail below.

As shown in the figure, preferably, the air conditioning system includes a reheater 14, and the inlet of the reheater 14 is connected to the flow path between the exhaust port of the compressor 30 and the four-way valve, so The outlet of the reheater 14 is connected to the flow path between the condenser 11 and the heat exchanger 20 . Since the reheater 14 is provided, the temperature of the fresh air can be more reliably regulated. In addition, since the inlet of the reheater 14 is connected to the discharge port of the compressor 30 , the fluid medium delivered by the compressor 30 will be divided into the above-mentioned four-way valve and the reheater 14 .

In order to control the flow direction of the medium and adapt to different working conditions, preferably, the condenser 11 is connected in series with a first throttle valve EEV1; the evaporator 12 is connected with a second throttle valve EEV2 in series; The exchanger 20 is connected in series with a third throttle valve EEV3; and/or the reheater 14 is connected with a fourth throttle valve EEV4 in series. The physical state of the medium, such as pressure and flow, can also be regulated using these throttle valves.

The connection structure of the fourth embodiment is described in detail above, and the working principle of the technical solution of the fourth embodiment under different working conditions is described below.

2.4.a Summer conditions

In the summer cooling and dehumidification condition, the first throttle valve EEV1 is fully opened. Before entering the four-way valve, the high-temperature and high-pressure refrigerant discharged from the compressor 30 is bypassed all the way to the reheater 14 to reheat the dehumidified air. The refrigerant flow (ie, reheat) of the bypass branch is regulated by the fourth throttle valve EEV4. The other refrigerant passing through the four-way valve enters the condenser 11 to be cooled down into a low temperature and high pressure liquid, and after being collected with the refrigerant from the reheater 14, it is divided into two paths. After the first refrigerant passes through the expansion and throttling of the second throttle valve EEV2, it enters the dehumidifying evaporator 12 to cool and dehumidify the outdoor fresh air; The exchanger 20 produces high temperature cold water. Finally, the two refrigerants are collected before the gas-liquid separator and enter the compressor to complete a cycle.

It can be seen from the above description that under summer operating conditions, high-temperature cold water is directly prepared by the heat exchanger for indoor radiant cooling; the low-temperature evaporator 12 dehumidifies the outdoor fresh air by exchanging heat with fluorine air. Therefore, the independent control of temperature and humidity is realized, and the energy consumption of the system is relatively low.

2.4.b Winter conditions

In the winter heating and dehumidification mode, the third throttle valve EEV3 is fully opened. Before entering the four-way valve, the high-temperature and high-pressure refrigerant discharged from the compressor 30 is bypassed all the way to the reheater 14 to reheat the dehumidified air. The refrigerant flow (ie, reheat) of the bypass branch is regulated by the fourth throttle valve EEV4. Another high-temperature and high-pressure refrigerant that passes through the four-way valve enters the heat exchanger to produce hot water for heating. Then it is divided into two paths, one path enters the dehumidification evaporator 12 after expansion and throttling of the second throttle valve EEV2 to cool and dehumidify the outdoor fresh air; the other path collects the refrigerant from the reheater 14 and passes through the first throttle After the expansion and throttling of the valve EEV1, before the gas-liquid separator, it is collected with the refrigerant in the dehumidification evaporator 12, and then returned to the compressor to complete one cycle.

In the pure heating mode in winter, the valves EEV2 and 4 are closed, and the reheater 14 and the evaporator 12 do not take refrigerant. The high temperature and high pressure refrigerant discharged from the compressor 30 no longer flows to the reheater 14 , but only flows to the heat exchanger 20 .

Since the reheater and the evaporator are used as equipment for dehumidifying the fresh air, the flow direction of the refrigerant in winter and summer does not change. Therefore, the biggest difference in this scheme is that the high-pressure gas pipe connected from the compressor discharge port does not change. After passing through the reheater and the evaporator through the four-way valve, it is connected to the low-pressure gas pipe connected to the suction port of the compressor, so that it can meet the dehumidification needs in winter and summer. At the same time, this solution greatly reduces the use of valves, simplifies control, and makes the system easier to implement. In addition, the refrigerant flow rates of the reheater 14 and the dehumidification evaporator 12 can be adjusted independently of each other, enabling accurate control of air parameters.

It can be seen from the above description that in winter mode, the technical solution of Embodiment 4 can not only preheat the fresh air, but also directly heat the indoor air at the radiant end by using the heat radiator 21, so that the indoor temperature can quickly reach the required temperature.

The connection structures of different embodiments and their operation processes and principles under different working conditions are described above. On the premise that there is no technical conflict or contradiction, the features of the above-mentioned different embodiments can be combined with each other or learn from each other, and the description will not be repeated here. For example, as shown in the drawings, in the flow direction of fresh air, the fresh air processor 23, the evaporator 12 and the reheater 14 (the reheater 14 may be omitted in some embodiments) go from upstream to The downstream is arranged in sequence for a more reliable and precise adjustment of the temperature and/or humidity of the fresh air.

According to this arrangement, for example, when the refrigeration and dehumidification is running in summer, the outdoor air with high temperature and high humidity first passes through 23. At this time, the temperature of the refrigerant introduced into 23 is the same as the temperature of the radiator, usually 16-18 °C, and the fresh air first passes through the radiator. The fresh air processor 23 of the 16-18°C refrigerant is pre-cooled and cooled, and the temperature and humidity are lowered to about 20-23°C. After the humidity is close to saturation, it passes through the evaporator 12 . At this time, the refrigerant at 0-8°C is introduced into the evaporator 12, and the fresh air passes through the evaporator 12 to further cool down. The air is already close to saturation after passing through the evaporator 12. At this time, after passing through the evaporator 12, the air will be further cooled, and at the same time A large amount of saturated water in the air will be precipitated, forming a good dehumidification effect. The dehumidified fresh air is then heated through the reheater 14. At this time, the temperature of the cooling/heat medium in the reheater 14 is between 30 and 60°C. The fresh air is reheated to about 20°C through the reheater and then sent to Indoors, this process makes the outdoor air go through the process of cooling, cooling and dehumidification, and heating. Through hardware design and software control, the air can be precisely adjusted to achieve the state required by the system.

By arranging in sequence, the fresh air can flow for a long time and fully exchange cold and heat with the heat exchanger, which provides great convenience for the precise adjustment of the air.

The above-mentioned arrangement order is not limited to this, and the above-mentioned fresh air processor 23 , evaporator 12 and reheater 14 may also have other arrangement orders.

In addition, by making improvements on the basis of the fourth embodiment, the embodiment shown in FIG. 4d can be obtained, in which the fresh air processor 23 can be omitted. In the first to third embodiments, the fresh air processor 23 can also be selectively omitted. In the embodiment shown in FIG. 4d , the operation principle and process of the summer working condition and the winter working condition can refer to the fourth embodiment, and the defrosting mode can also be realized at the same time, and its operation principle and process can be referred to as shown in FIG. 4d . Describe in detail.

In addition, as shown in the drawings, an oil separator (ie, an oil separator) can also be provided in the air conditioning system to separate the lubricating oil in the refrigerant medium and ensure the reliable operation of the system.

The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of the present application. within the scope of protection.

Claims (9)

1. An air-conditioning system, characterized in that the air-conditioning system comprises: A fresh air module comprising a fluidly connected compressor, a condenser (11) and an evaporator (12) for regulating the temperature and/or humidity of the fresh air; and A temperature module, the flow path of the temperature module is heat-exchanged with the flow path of the fresh air module but is not connected, the temperature module is used to regulate the temperature of the user side, and the temperature module includes: a heat exchanger (20) for exchanging heat with a flow path of the fresh air module passing through the heat exchanger; a heat radiator (21), the heat radiator (21) is located in the use side and connected with the heat exchanger (20) to form a closed flow path; a pump (22) connected in series in the closed flow path; Wherein the fresh air module further comprises a bidirectional flasher (13), and the bidirectional flasher (13) comprises: a first connecting pipe (131), the first connecting pipe (131) being communicated with the condenser (11) and extending into the lower part of the flasher (13); a second connecting pipe (132), the second connecting pipe (132) communicates with the evaporator (12) and extends into the lower part of the flasher (13); and A first connection port (133) and a second connection port (134), the first connection port (133) is located at the lower part of the flasher (13), the second connection port (134) is located in the flasher (13) ), the first connection port (133) is connected to the water inlet of the heat exchanger (20) through a first one-way valve (139), and the water outlet of the heat exchanger (20) is connected to the water inlet of the heat exchanger (20) by electromagnetic A valve (140) is connected to the second connection port (134). 2. The air conditioning system according to claim 1, characterized in that, the temperature module comprises a fresh air processor (23), and the fresh air processor (23) is connected in parallel with the heat radiator (21), for The temperature and/or humidity of the fresh air is regulated. 3. The air conditioning system according to claim 2, characterized in that, a regulating valve is connected in series with the fresh air processor (23) and/or the heat exchanger (20). 4. The air conditioning system according to claim 1, wherein the compressor comprises a first compressor (101) and a second compressor (102) connected in series, the first compressor (101) and the second compressor (101) The two compressors (102) are respectively connected with four-way valves to selectively deliver fluid medium to the condenser (11) or the evaporator (12). 5. The air-conditioning system according to claim 4, characterized in that a gas phase outlet (135) is provided on the upper part of the bidirectional flasher (13), and the gas phase outlet (135) is connected to the first compressor (101) ) and the second compressor (102). 6. The air conditioning system according to claim 1, characterized in that, the condenser (11) and the evaporator (12) are respectively connected with first and third throttle valves (EEV1, EEV3) in series. 7. The air conditioning system according to claim 1, characterized in that the air conditioning system comprises a heat exchange bypass, which is connected in parallel with the evaporator (12) and passes through the heat exchanger (20) ) to enable heat exchange. 8. The air conditioning system according to claim 7, wherein a second check valve (136) and/or a second throttle valve (EEV2) are connected in series in the heat exchange bypass. 9. The air conditioning system according to claim 2, wherein in the flow direction of the fresh air, the fresh air processor (23) and the evaporator (12) are sequentially arranged from upstream to downstream.

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