Air conditioning system and control method

Abstract

The invention provides an air conditioning system and a control method.The air conditioning system comprises a heat pump system, a fresh air handling unit, a water-fluorine heat exchange module and a controller, the heat pump system communicates with the fresh air handling unit and the water-fluorine heat exchange module through a switch valve assembly, and the controller is in communication connection with the switch valve assembly; the controller controls the on-off state of the switch valve assembly according to the received outdoor temperature and outdoor humidity. If the outdoor temperature meets the preset first temperature threshold value and the outdoor humidity meets the preset first humidity threshold value, the switch valve assembly is controlled to be opened, and the heat pump system supplies cold to the fresh air handling unit and / or the water fluorine heat exchange module; and if the outdoor temperature meets the preset second temperature threshold value and the outdoor humidity meets the preset second humidity threshold value, the switch valve assembly is controlled to be opened, and the heat pump system supplies heat to the fresh air handling unit and / or the water fluorine heat exchange module. According to the invention, automatic refrigeration or heat supply for the fresh air handling unit and / or the water-fluorine heat exchange module is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning system and a control method. Background Art

[0002] The air conditioning system is a system used to process indoor air temperature, humidity, etc. The existing air conditioning system includes an air-cooled heat pump, a fresh air unit and a water-fluorine heat exchange module. The fresh air unit uses a separate outdoor unit for cooling or heating, and the air-cooled heat pump uses the water-fluorine heat exchange module for cooling or heating, or uses natural fluorine and ground water. The existing air conditioning system has many equipment, wastes energy, and has high costs. At the same time, the outdoor unit of the existing fresh air unit occupies a large area and cannot achieve deep dehumidification and humidification. The water-fluorine heat exchange module of the natural fluorine and ground water system cannot achieve cooling alone, and cannot achieve cooling or heating in the initial stage of heating. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an air-conditioning system and a control method, so as to realize the use of a heat pump system to provide cooling or heating for a fresh air unit and / or a water-fluorine heat exchange module, thereby reducing the floor space occupied by the outdoor unit and reducing costs. At the same time, the heat pump system can provide cooling or heating for the water-fluorine heat exchange module alone.

[0004] The technical solution of the present invention provides an air conditioning system, comprising a heat pump system, a fresh air unit, a water-fluorine heat exchange module and a controller, wherein the heat pump system is respectively connected to the fresh air unit and the water-fluorine heat exchange module through a switch valve assembly, the controller is communicatively connected to the switch valve assembly, and the controller controls the switch state of the switch valve assembly according to the received outdoor temperature and outdoor humidity;

[0005] If the outdoor temperature meets a preset first temperature threshold, and the outdoor humidity meets a preset first humidity threshold, the switch valve assembly is controlled to open, so that the heat pump system provides cooling for the fresh air unit and / or the water-fluorine heat exchange module;

[0006] If the outdoor temperature meets the preset second temperature threshold, and the outdoor humidity meets the preset second humidity threshold, the switch valve assembly is controlled to open so that the heat pump system provides heat for the fresh air unit and / or the water-fluorine heat exchange module, and the second temperature threshold is lower than the first temperature threshold, and the second humidity threshold is lower than the first humidity threshold.

[0007] In one of the optional technical solutions, the heat pump system includes a first air-fluorine module and a second air-fluorine module, the switch valve assembly includes a first switch valve and a second switch valve, the first air-fluorine module is connected to the fresh air unit and the water-fluorine heat exchange module respectively through the first switch valve, and the second air-fluorine module is connected to the fresh air unit and the water-fluorine heat exchange module respectively through the second switch valve.

[0008] In one of the optional technical solutions, the controller is also used for:

[0009] If in the initial stage of cooling or heating, the first air-fluorine module is controlled to be connected to the fresh air unit and the water-fluorine heat exchange module respectively through the first switch valve;

[0010] If in the cooling period or the heating period, the first air-fluorine module is controlled to be connected with the fresh air unit and the water-fluorine heat exchange module respectively through the first switch valve, and the second air-fluorine module is controlled to be connected with the fresh air unit and the water-fluorine heat exchange module respectively through the second switch valve.

[0011] In one of the optional technical solutions, the controller is also used for:

[0012] Obtaining the return water temperature of the heat pump system, the fresh air unit and the water-fluorine heat exchange module;

[0013] If the return water temperature is lower than a preset third temperature threshold, the fan frequencies of the first air-fluorine module and the second air-fluorine module are reduced.

[0014] In one of the optional technical solutions, if the return water temperature is lower than a preset third temperature threshold, the fan frequencies of the first air-fluorine module and the second air-fluorine module are reduced, and then the method further includes:

[0015] Obtaining the water supply temperature of the heat pump system, the fresh air unit and the water-fluorine heat exchange module;

[0016] If the temperature difference between the return water temperature and the supply water temperature is less than a preset fourth temperature threshold, the second air-fluorine module and the second switch valve are closed.

[0017] In one of the optional technical schemes, the fresh air unit includes a first fan coil and a second fan coil arranged on both sides of the humidification module of the fresh air unit, the switch valve assembly includes a third switch valve and a fourth switch valve, one end of the first fan coil is connected to the heat pump system through the switch valve assembly, the other end of the first fan coil is connected to one end of the third switch valve, the other end of the third switch valve is respectively connected to one end of the second fan coil and the first end of the fourth switch valve, the other end of the second fan coil is connected to the second end of the fourth switch valve, and the third end of the fourth switch valve is connected to the heat pump system.

[0018] In one of the optional technical solutions, the controller is also used for:

[0019] If the outdoor temperature meets the first temperature threshold, and the outdoor humidity meets the first humidity threshold, controlling the heat pump system to be connected to the first fan coil unit and the second fan coil unit through the first switch valve and the third switch valve respectively;

[0020] If the outdoor temperature meets the second temperature threshold and the outdoor humidity meets the second humidity threshold, the heat pump system is controlled to be connected to the first fan coil unit through the first switch valve, and the third switch valve is not connected to the second fan coil unit.

[0021] In one of the optional technical solutions, the controller is also used for:

[0022] If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the second humidity threshold and less than the first humidity threshold, the heat pump system is controlled to be disconnected from the fresh air unit, and the heat pump system is connected to the water-fluorine heat exchange module.

[0023] In one of the optional technical solutions, the controller is also used for:

[0024] If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the first humidity threshold, the heat pump system is controlled to be connected to the fresh air unit, and the heat pump system is not connected to the water-fluorine heat exchange module.

[0025] The technical solution of the present invention further provides a control method for the air conditioning system as described above, characterized in that it comprises:

[0026] Get outdoor temperature and outdoor humidity;

[0027] If the outdoor temperature meets a preset first temperature threshold, and the outdoor humidity meets a preset first humidity threshold, the switch valve assembly is controlled to open, so that the heat pump system provides cooling for the fresh air unit and / or the water-fluorine heat exchange module;

[0028] If the outdoor temperature meets the preset second temperature threshold, and the outdoor humidity meets the preset second humidity threshold, the switch valve assembly is controlled to open so that the heat pump system provides heat for the fresh air unit and / or the water-fluorine heat exchange module, and the second temperature threshold is lower than the first temperature threshold, and the second humidity threshold is lower than the first humidity threshold.

[0029] After adopting the above technical scheme, it has the following beneficial effects: the heat pump system is connected with the fresh air unit and the water-fluorine heat exchange module respectively through the switch valve assembly, and the switch valve assembly is controlled to open by the controller according to the received outdoor temperature and outdoor humidity, so that the heat pump system can provide cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module, and one heat pump system can automatically provide cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module, without the need for two heat pump systems to provide cooling or heating for the fresh air unit and the water-fluorine heat exchange module respectively, thereby reducing the floor space occupied by the outdoor unit and reducing costs. At the same time, the heat pump system can provide cooling or heating for the water-fluorine heat exchange module separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:

[0031] Figure 1 A schematic diagram of the structure of an air conditioning system provided by one embodiment of the present invention;

[0032] Figure 2 The working principle diagram of the air conditioning system of the present invention;

[0033] Figure 3 A flowchart of a control method for an air conditioning system provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0034] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a variety of structural modes and implementation modes that can be replaced by those skilled in the art can be replaced with each other. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the invention.

[0036] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0037] like Figure 1As shown, an air conditioning system provided by an embodiment of the present invention includes a heat pump system 10, a fresh air unit 20, a water-fluorine heat exchange module 30 and a controller. The heat pump system 10 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively through a switch valve assembly 40. The controller is in communication connection with the switch valve assembly 40. The controller controls the switch state of the switch valve assembly 40 according to the received outdoor temperature and outdoor humidity.

[0038] If the outdoor temperature meets the preset first temperature threshold, and the outdoor humidity meets the preset first humidity threshold, the switch valve assembly 40 is controlled to open, so that the heat pump system 10 provides cooling for the fresh air unit 20 and / or the water-fluorine heat exchange module 30;

[0039] If the outdoor temperature meets the preset second temperature threshold and the outdoor humidity meets the preset second humidity threshold, the switch valve assembly 40 is controlled to open, so that the heat pump system 10 provides heat for the fresh air unit 20 and / or the water-fluorine heat exchange module 30, and the second temperature threshold is less than the first temperature threshold, and the second humidity threshold is less than the first humidity threshold.

[0040] The heat pump system 10 is arranged in the outdoor unit. The heat pump system 10 mainly includes an air-cooled heat pump. The heat pump system 10 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 through the switch valve assembly 40. The heat pump system 10 processes the outdoor air to generate refrigerant for cooling and dehumidifying or heating and humidifying the fresh air unit 20 and the water-fluorine heat exchange module 30.

[0041] The controller is used to control the switching state of the switch valve assembly 40. When the controller receives the outdoor temperature and outdoor humidity, it determines whether the outdoor temperature meets the first temperature threshold or the second temperature threshold, and whether the outdoor humidity meets the first humidity threshold or the second humidity threshold. If the outdoor temperature meets the first temperature threshold and the outdoor humidity meets the first humidity threshold, or the outdoor temperature meets the second temperature threshold and the outdoor humidity meets the second humidity threshold, the switch valve assembly 40 is controlled to open, so that the heat pump system 10 is connected to the fresh air unit and / or the water-fluorine heat exchange module 30. The heat pump system 10 provides cooling or heating for the fresh air unit 20 and / or the water-fluorine heat exchange module 30, thereby automatically cooling or heating the fresh air unit and / or the water-fluorine heat exchange module.

[0042] The heat pump system 10 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively through the fluorine pipe and the switch valve assembly 40 to prevent freezing and improve stability.

[0043] Among them, the specific structures and working principles of the heat pump system 10, the fresh air unit 20 and the water-fluorine heat exchange module 30 are existing technologies, which do not belong to the improvement points of the present application and will not be elaborated here.

[0044] Among them, the first temperature threshold, the second temperature threshold, the first humidity threshold and the second humidity threshold can be set according to user needs. The first temperature threshold and the first humidity threshold can be set to the temperature and humidity corresponding to summer, and the second humidity threshold and the second humidity threshold can be set to the temperature and humidity corresponding to winter.

[0045] Wherein, the controller is preferably a programmable logic controller (PLC).

[0046] In this embodiment, the heat pump system is connected to the fresh air unit and the water-fluorine heat exchange module respectively through the switch valve assembly, and the switch valve assembly is controlled to open by the controller according to the received outdoor temperature and outdoor humidity, so that the heat pump system can provide cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module, thereby realizing that one heat pump system can automatically provide cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module, and there is no need for two heat pump systems to provide cooling or heating for the fresh air unit and the water-fluorine heat exchange module respectively, thereby reducing the floor space occupied by the outdoor unit and reducing costs. At the same time, the heat pump system can provide cooling or heating for the water-fluorine heat exchange module separately.

[0047] In one embodiment, the heat pump system 10 includes a first air-fluorine module 11 and a second air-fluorine module 12, and the switch valve assembly 40 includes a first switch valve V1 and a second switch valve V2. The first air-fluorine module 11 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively through the first switch valve V1, and the second air-fluorine module 12 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively through the second switch valve V2.

[0048] The first switch valve V1 is used to adjust the refrigerant flow of the first air-fluorine module 11, and the second switch valve V2 is used to adjust the refrigerant flow of the second air-fluorine module 12. The first air-fluorine module 11 and the second air-fluorine module 12 are connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 through the first switch valve V1 and the second switch valve V2 respectively, to provide cooling or heating for the fresh air unit 20 and the water-fluorine heat exchange module 30.

[0049] Preferably, the switch valve assembly 40 further includes a fifth switch valve V5 and a sixth switch valve V6, the input end of the first switch valve V1 is connected to the first air-fluorine module 11, the output end of the first switch valve V1 is connected to the input end of the fifth switch valve V5, and the output end of the fifth switch valve V5 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively;

[0050] The input end of the second switch valve V2 is connected to the second air-fluorine module 12, the output end of the second switch valve V2 is connected to the input end of the sixth switch valve V6, and the output end of the sixth switch valve V6 is connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively.

[0051] The third switch valve 45 is used to adjust the refrigerant flow rate of the first air-fluorine module 11 output to the fresh air unit 20 and the water-fluorine heat exchange module 30, and the fourth switch valve 46 is used to adjust the refrigerant flow rate of the second air-fluorine module 12 output to the fresh air unit 20 and the water-fluorine heat exchange module 30, thereby realizing the control of the refrigerant flow rate of the fresh air unit 20 and the water-fluorine heat exchange module 30 according to demand.

[0052] In one embodiment, the controller is further configured to:

[0053] If in the initial stage of cooling or heating, the first air-fluorine module 11 is controlled to be connected to the fresh air unit 20 and the water-fluorine heat exchange module 30 through the first switch valve V1;

[0054] If in the cooling period or the heating period, the first air-fluorine module 11 is controlled to be connected with the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively through the first switch valve V1, and the second air-fluorine module 12 is connected with the fresh air unit 20 and the water-fluorine heat exchange module 30 respectively through the second switch valve V2.

[0055] In summer or winter, at the beginning of cooling or heating, the first switch valve V1 is controlled to be open, and the first air-fluorine module 11 provides cooling or heating for the fresh air unit 20 and the water-fluorine heat exchange module 30, saving energy and further reducing costs. In the cooling period or heating period, the first switch valve V1 and the second switch valve V2 are controlled to be open, and the first air-fluorine module 11 and the second air-fluorine module 12 provide cooling or heating for the fresh air unit 20 and the water-fluorine heat exchange module 30 at the same time.

[0056] Preferably, at the beginning of cooling or heating, the controller will also control the fifth switch valve V5 and the sixth switch valve V6 to open, so that part of the refrigerant from the first air-fluorine module 11 and the second air-fluorine module 12 is supplied to the fresh air unit 20 to adjust the outdoor temperature change and ensure a constant supply air temperature, and the other part of the refrigerant is supplied to the water-fluorine heat exchange module 30 and the radiation air-conditioning terminal.

[0057] In one embodiment, the controller is further configured to:

[0058] Obtaining the return water temperature of the heat pump system 10, the fresh air unit 20 and the water-fluorine heat exchange module 30;

[0059] If the return water temperature is lower than the preset third temperature threshold, the fan frequencies of the first air-fluorine module 11 and the second air-fluorine module 12 are reduced.

[0060] The controller detects the return water temperature of the refrigerant through a temperature sensor arranged on the return water pipe. When the return water temperature is detected to be lower than the third temperature threshold, it indicates that the indoor load temperature is low. The fan frequency of the first air-fluorine module 11 and the second air-fluorine module 12 can be reduced, thereby reducing energy consumption and further reducing costs.

[0061] Among them, the third temperature threshold can be set according to user needs.

[0062] In one embodiment, if the return water temperature is lower than a preset third temperature threshold, the fan frequencies of the first air-fluorine module 11 and the second air-fluorine module 12 are reduced, and then the following steps are further included:

[0063] Obtaining the water supply temperature of the heat pump system 10, the fresh air unit 20 and the water-fluorine heat exchange module 30;

[0064] If the temperature difference between the return water temperature and the supply water temperature is less than the preset fourth temperature threshold, the second air-fluorine module 12 and the second switch valve V2 are closed.

[0065] If the return water temperature is lower than the third temperature threshold, the water supply temperature of the refrigerant is adjusted, and the temperature sensors arranged at the output ends of the first air-fluorine module 11 and the second air-fluorine module 12 detect the water supply temperature of the refrigerant. When the temperature difference between the return water temperature and the water supply temperature is less than the fourth temperature threshold, the controller closes the second air-fluorine module 12 and the second switch valve V2, and only retains the first air-fluorine module 11 to provide cooling or heating for the fresh air unit 20 and the water-fluorine heat exchange module 30, thereby further reducing energy consumption and costs.

[0066] The fourth temperature threshold can be set according to user needs, and the fourth temperature threshold is preferably set to the fan adjustment temperature range of the first air-fluorine module 11 and the second air-fluorine module 12 .

[0067] In one embodiment, the fresh air unit 20 includes a first fan coil 21 and a second fan coil 22 arranged on both sides of the humidification module 23 of the fresh air unit 20, the switch valve assembly 40 includes a third switch valve V3 and a fourth switch valve V4, one end of the first fan coil 21 is connected to the heat pump system 10 through the switch valve assembly 40, the other end of the first fan coil 21 is connected to one end of the third switch valve V3, the other end of the third switch valve V3 is respectively connected to one end of the second fan coil 22 and the first end of the fourth switch valve V4, the other end of the second fan coil 22 is connected to the second end of the fourth switch valve V4, and the third end of the fourth switch valve V4 is connected to the heat pump system 10.

[0068] The first fan coil unit 21 and the second fan coil unit 22 are arranged on opposite sides of the humidification module 23. The first air-fluorine module 11 is connected to the first fan coil unit 21 through the first switch valve V1 and the fifth switch valve V5. The first fan coil unit 21 is connected to the second fan coil unit 22 and the fourth switch valve V4 through the third switch valve V3. The second fan coil unit 22 is connected to the fourth switch valve V4, and the fourth switch valve V4 is connected to the sixth switch valve V6.

[0069] In the initial stage of cooling or heating, part of the refrigerant in the first air-fluorine module 11 is supplied to the first fan coil 21 through the fifth switch valve V5, and then the flow entering the second fan coil 22 is adjusted through the third switch valve V3 to adjust the outdoor temperature change to ensure constant air supply temperature and humidity. Another part of the refrigerant in the first air-fluorine module 11 is supplied to the water-fluorine heat exchange module 30 through the fifth switch valve V5 and supplied to the radiation air conditioning terminal, thereby realizing the initial cooling dehumidification or heating humidification function.

[0070] During the cooling period or heating period, part of the refrigerant of the first air-fluorine module 11 is supplied to the first fan coil 21 through the fifth switch valve V5, and then the flow into the second fan coil 22 is adjusted through the third switch valve V3. At the same time, part of the refrigerant of the second air-fluorine module 12 is supplied to the fourth switch valve V4 through the sixth switch valve V6, and then the fourth switch valve V4 adjusts the flow into the third switch valve V3 and the second fan coil 21 to adjust the outdoor temperature change and ensure constant air supply temperature and humidity. Another part of the refrigerant of the first air-fluorine module 11 and the second air-fluorine module 12 is supplied to the water-fluorine heat exchange module 30 through the fifth switch valve V5 and the sixth switch valve V6, respectively, and supplied to the radiation air conditioning terminal, thereby realizing the cooling and dehumidification or heating and humidification functions.

[0071] In one embodiment, the controller is further configured to:

[0072] If the outdoor temperature meets the preset first temperature threshold, and the outdoor humidity meets the preset first humidity threshold, the heat pump system 10 is controlled to be connected to the first fan coil unit 21 and the second fan coil unit 22 through the first switch valve V1 and the third switch valve V3 respectively;

[0073] If the outdoor temperature meets the preset second temperature threshold and the outdoor humidity meets the preset second humidity threshold, the heat pump system 10 is controlled to be connected to the first fan coil 21 through the first switch valve V1, and the third switch valve V3 is not connected to the second fan coil 22.

[0074] In summer, the controller controls the first switch valve V1 and the third switch valve V3 to open, so that the heat pump system 10 delivers refrigerant to the first fan coil 21 and the second fan coil respectively. In winter, the controller controls the first switch valve V1 to open and the third switch valve V3 to close, so that the heat pump system 10 only delivers refrigerant to the first fan coil 21, and delivers the fresh air into the room after humidification by the humidification module 23, and does not deliver refrigerant to the second fan coil 22.

[0075] In one embodiment, the controller is further configured to:

[0076] If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the second humidity threshold and less than the first humidity threshold, the heat pump system 10 is controlled to be disconnected from the fresh air unit 20, and the heat pump system 10 is connected to the water-fluorine heat exchange module 30.

[0077] If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the second humidity threshold and less than the first humidity threshold, that is, when the outdoor temperature and humidity are not very high, the fresh air unit 20 does not need to dehumidify, and the heat pump system 10 provides refrigerant for the water-fluorine heat exchange module 30, further saving energy consumption and reducing costs.

[0078] Preferably, the controller is also used to adjust the fan frequency of the heat pump system 10 according to the detected heating temperature of the indoor space provided by the water-fluorine heat exchange module 30, such as the higher the heating temperature, the lower the fan frequency.

[0079] In one embodiment, the controller is further configured to:

[0080] If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the first humidity threshold, the heat pump system 10 is controlled to be connected to the fresh air unit 20, and the heat pump system 10 is disconnected from the water-fluorine heat exchange module 30.

[0081] If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the first humidity threshold, that is, the outdoor temperature is not high, but the outdoor humidity is relatively high (such as the rainy season), the water-fluorine heat exchange module 30 is not turned on, and the heat pump system 10 only provides refrigerant to the fresh air unit 20. Preferably, the first air-fluorine module 11 is turned on, and refrigerant is provided to the first fan coil 21 through the first switch valve V1 and the third switch valve V3 for deep dehumidification, and then the flow rate of the fifth switch valve V5 supplied to the second fan coil 22 is adjusted according to the temperature and humidity of the fresh air unit 20, so that the temperature of the fresh air unit 20 increases and the humidity decreases.

[0082] like Figure 3 As shown, an embodiment of the present invention provides a control method for an air conditioning system, comprising:

[0083] Step S301: Obtaining outdoor temperature and outdoor humidity;

[0084] Step S302: If the outdoor temperature meets the preset first temperature threshold, and the outdoor humidity meets the preset first humidity threshold, the switch valve assembly is controlled to open, so that the heat pump system provides cooling for the fresh air unit and / or the water-fluorine heat exchange module;

[0085] Step S303: If the outdoor temperature meets the preset second temperature threshold and the outdoor humidity meets the preset second humidity threshold, the switch valve assembly is controlled to open so that the heat pump system provides heat for the fresh air unit and / or the water-fluorine heat exchange module, and the second temperature threshold is less than the first temperature threshold, and the second humidity threshold is less than the first humidity threshold.

[0086] Specifically, the controller executes step S301 to obtain the outdoor temperature and outdoor humidity in real time, and determines whether the outdoor temperature meets the first temperature threshold or the second temperature threshold, and whether the outdoor humidity meets the first humidity threshold or the second humidity threshold. If step S302 is executed, if the outdoor temperature meets the first temperature threshold and the outdoor humidity meets the first humidity threshold, or the outdoor temperature meets the second temperature threshold and the outdoor humidity meets the second humidity threshold, the switch valve assembly is controlled to open, so that the heat pump system is connected to the fresh air unit and / or the water-fluorine heat exchange module, and the heat pump system provides cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module, thereby automatically cooling or heating the fresh air unit and / or the water-fluorine heat exchange module.

[0087] In this embodiment, by acquiring the outdoor temperature and outdoor humidity in real time, the switch valve assembly is controlled to open, so that the heat pump system can provide cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module, so that one heat pump system can automatically provide cooling or heating for the fresh air unit and / or the water-fluorine heat exchange module. There is no need for two heat pump systems to provide cooling or heating for the fresh air unit and the water-fluorine heat exchange module respectively, which reduces the floor space occupied by the outdoor unit and reduces the cost. At the same time, the heat pump system can provide cooling or heating for the water-fluorine heat exchange module separately.

[0088] The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, rather than to limit them. Although the embodiments of the present invention are described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air conditioning system, characterized in that: It includes a heat pump system, a fresh air unit, a water-fluorine heat exchange module and a controller, wherein the heat pump system is connected to the fresh air unit and the water-fluorine heat exchange module respectively through a switch valve assembly, and the controller is in communication connection with the switch valve assembly, and the controller controls the switch state of the switch valve assembly according to the received outdoor temperature and outdoor humidity; If the outdoor temperature meets a preset first temperature threshold, and the outdoor humidity meets a preset first humidity threshold, the switch valve assembly is controlled to open, so that the heat pump system provides cooling for the fresh air unit and / or the water-fluorine heat exchange module; If the outdoor temperature meets the preset second temperature threshold, and the outdoor humidity meets the preset second humidity threshold, the switch valve assembly is controlled to open so that the heat pump system provides heat for the fresh air unit and / or the water-fluorine heat exchange module, and the second temperature threshold is lower than the first temperature threshold, and the second humidity threshold is lower than the first humidity threshold.

2. The air conditioning system according to claim 1, characterized in that: The heat pump system includes a first air-fluorine module and a second air-fluorine module, the switch valve assembly includes a first switch valve and a second switch valve, the first air-fluorine module is connected to the fresh air unit and the water-fluorine heat exchange module respectively through the first switch valve, and the second air-fluorine module is connected to the fresh air unit and the water-fluorine heat exchange module respectively through the second switch valve.

3. The air conditioning system according to claim 2, characterized in that: The controller is also used for: If in the initial stage of cooling or heating, the first air-fluorine module is controlled to be connected to the fresh air unit and the water-fluorine heat exchange module respectively through the first switch valve; If in the cooling period or the heating period, the first air-fluorine module is controlled to be connected with the fresh air unit and the water-fluorine heat exchange module respectively through the first switch valve, and the second air-fluorine module is controlled to be connected with the fresh air unit and the water-fluorine heat exchange module respectively through the second switch valve.

4. The air conditioning system according to claim 3, characterized in that: The controller is also used for: Obtaining the return water temperature of the heat pump system, the fresh air unit and the water-fluorine heat exchange module; If the return water temperature is lower than a preset third temperature threshold, the fan frequencies of the first air-fluorine module and the second air-fluorine module are reduced.

5. The air conditioning system according to claim 4, characterized in that: If the return water temperature is lower than a preset third temperature threshold, the fan frequencies of the first air-fluorine module and the second air-fluorine module are reduced, and then the method further includes: Obtaining the water supply temperature of the heat pump system, the fresh air unit and the water-fluorine heat exchange module; If the temperature difference between the return water temperature and the supply water temperature is less than a preset fourth temperature threshold, the second air-fluorine module and the second switch valve are closed.

6. The air conditioning system according to any one of claims 1 to 5, characterized in that: The fresh air unit includes a first fan coil unit and a second fan coil unit arranged on both sides of the humidification module of the fresh air unit, the switch valve assembly includes a third switch valve and a fourth switch valve, one end of the first fan coil unit is connected to the heat pump system through the switch valve assembly, the other end of the first fan coil unit is connected to one end of the third switch valve, the other end of the third switch valve is respectively connected to one end of the second fan coil unit and the first end of the fourth switch valve, the other end of the second fan coil unit is connected to the second end of the fourth switch valve, and the third end of the fourth switch valve is connected to the heat pump system.

7. The air conditioning system according to claim 6, characterized in that: The controller is also used for: If the outdoor temperature meets the first temperature threshold, and the outdoor humidity meets the first humidity threshold, controlling the heat pump system to be connected to the first fan coil unit and the second fan coil unit through the first switch valve and the third switch valve respectively; If the outdoor temperature meets the second temperature threshold and the outdoor humidity meets the second humidity threshold, the heat pump system is controlled to be connected to the first fan coil unit through the first switch valve, and the third switch valve is not connected to the second fan coil unit.

8. The air conditioning system according to claim 1, characterized in that: The controller is also used for: If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the second humidity threshold and less than the first humidity threshold, the heat pump system is controlled to be disconnected from the fresh air unit, and the heat pump system is connected to the water-fluorine heat exchange module.

9. The air conditioning system according to claim 1, characterized in that: The controller is also used for: If the outdoor temperature is greater than the second temperature threshold and less than the first temperature threshold, and the outdoor humidity is greater than the first humidity threshold, the heat pump system is controlled to be connected to the fresh air unit, and the heat pump system is not connected to the water-fluorine heat exchange module.

10. A control method for an air conditioning system according to any one of claims 1 to 9, characterized in that: include: Get outdoor temperature and outdoor humidity; If the outdoor temperature meets a preset first temperature threshold, and the outdoor humidity meets a preset first humidity threshold, the switch valve assembly is controlled to open, so that the heat pump system provides cooling for the fresh air unit and / or the water-fluorine heat exchange module; If the outdoor temperature meets the preset second temperature threshold, and the outdoor humidity meets the preset second humidity threshold, the switch valve assembly is controlled to open so that the heat pump system provides heat for the fresh air unit and / or the water-fluorine heat exchange module, and the second temperature threshold is lower than the first temperature threshold, and the second humidity threshold is lower than the first humidity threshold.

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