Epidemic prevention combined air conditioning unit and control method thereof

Abstract

The invention discloses an epidemic prevention combined air conditioning unit and a control method thereof. The air conditioning unit comprises a direct expansion air supply unit and an air return unit, the exhaust fan is connected with the air return unit; the air conditioning cabinet is connected with the direct expansion air supply unit and the air return unit; a three-medium heat exchanger is arranged in the air conditioner cabinet, one end of the three-medium heat exchanger is connected with a chilled water system through a chilled water pipeline, the other end of the three-medium heat exchanger is connected with a direct expansion outdoor unit through a refrigerant pipeline, a gas pipeline connected with the other end of the three-medium heat exchanger is divided into two gas branches, the first gas branch is connected into the direct expansion air supply unit, and the second gas branch is connected into the air return unit. A refrigerant pipeline connected with the direct expansion outdoor unit is divided into two refrigerant branches, the first refrigerant branch is connected into the three-medium heat exchanger, and the second refrigerant branch is connected into the direct expansion air supply unit. The invention provides a brand-new flat epidemic conversion air-conditioning system which is matched with air-conditioning systems with different epidemic situation degrees. The adaptability of the air conditioning system to the external environment is improved, and the complex epidemic situation environment is adapted.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning units, and in particular to a peace-and-epidemic combined air conditioning unit and a control method thereof. Background Art

[0002] In order to cope with possible sudden airborne epidemics in the future, it is proposed to adopt a design concept that combines peace and epidemic prevention in the HVAC design of ordinary public buildings.

[0003] The combination of peacetime and epidemic refers to normal operating conditions and epidemic operating conditions. In order to consider emergency measures during an epidemic, it is necessary to prepare for the epidemic in advance during the building design stage. The HVAC system is the "breathing system" of the building. People cannot survive without breathing. Similarly, if the building loses "breathing", the indoor air quality will not be able to meet people's basic needs.

[0004] When it comes to the hospital's inpatient ward environment, two completely different air-conditioning systems are needed for adaptation during normal times and epidemics. The function of the air-conditioning in general inpatient wards is only to provide indoor patients with a comfortable air-conditioned environment, and it does not rely on fresh air and high-efficiency filtration. The demand for fresh air can be met by opening windows for ventilation. The normal air-conditioning system is simple and reliable, but after an epidemic breaks out, the epidemic is generally transmitted through the respiratory tract and spread by the air. At this time, the HVAC system is particularly important for controlling the epidemic. In order to prevent the spread of the epidemic and ensure that there is enough fresh air indoors, a completely different air-conditioning system is needed. At this time, a lot of financial, human and material resources are required to solve the problem of conversion from normal times to epidemics.

[0005] The currently provided air conditioning and ventilation centralized control system that combines peacetime and epidemic prevention includes a building automation control system. The building automation control system includes a normal control system and a disaster control system. The normal control system can automatically switch to a disaster control system. The building automation control system also includes an epidemic prevention and control system. The normal control system can automatically switch to an epidemic prevention and control system. For key places and key institutions for epidemic prevention and control, ventilation and air exchange in closed air-conditioned areas are strengthened. While ensuring that the use of central air conditioning meets indoor comfort, it avoids being in a relatively closed environment all the time, reducing the risk of epidemic transmission and spread; the central air conditioning system has the function of combining peacetime and epidemic prevention. When there is an outbreak of an epidemic in the building, it can be switched to the "epidemic prevention working condition" with one click through centralized control, which effectively reduces the spread and spread of the epidemic in a timely manner.

[0006] With regard to the adaptation problem of the existing technology of combining peacetime and epidemic prevention with air-conditioning systems at different levels of the epidemic, no effective solution has been proposed so far. Summary of the invention

[0007] An embodiment of the present invention provides a peacetime and epidemic combined air-conditioning unit and a control method thereof to solve the adaptation problem of the peacetime and epidemic combined air-conditioning system when the epidemic situation is of different severity in the prior art.

[0008] In order to solve the above technical problems, the present invention provides a combined air-conditioning unit for indoor use, wherein the combined air-conditioning unit for indoor use comprises: a direct expansion air supply unit for indoor air supply, and a return air unit for indoor return air; and further comprises: an exhaust fan connected to the return air unit; an air-conditioning cabinet connected to the direct expansion air supply unit and the return air unit, performing air conditioning by inhaling fresh air and return air, and then delivering the air into the room; the air-conditioning cabinet has a built-in three-medium heat exchanger, one end of the three-medium heat exchanger is connected to a chilled water system through a chilled water pipeline, and the other end is connected to a direct expansion outdoor unit through a refrigerant pipeline, and the gas pipeline connected at one end is divided into two gas branches, the first gas branch is connected to the direct expansion air supply unit, and the second gas branch is connected to the return air unit; the refrigerant pipeline connected to the direct expansion outdoor unit is divided into two refrigerant branches, the first refrigerant branch is connected to the three-medium heat exchanger, and the second refrigerant branch is connected to the direct expansion air supply unit.

[0009] Furthermore, a first valve is arranged on the second gas branch; the air-conditioning cabinet is provided with an air inlet, and a second valve is arranged on the pipeline between the air inlet and the return air unit; a third valve is arranged on the pipeline between the exhaust fan and the return air unit; a fifth valve is arranged on the first refrigerant branch; and a sixth valve is arranged on the second refrigerant branch.

[0010] Furthermore, the exhaust fan is provided with a first exhaust port and a second exhaust port, the first exhaust port is connected to the return air unit for direct exhaust, and a fourth valve and an exhaust filter are provided between the first exhaust port and the second exhaust port.

[0011] Furthermore, the direct expansion air supply unit has a built-in direct expansion heat exchanger for temperature control.

[0012] Furthermore, a humidifier and a filter are arranged between the three-medium heat exchanger and the air inlet of the air-conditioning cabinet.

[0013] The present invention also provides a control method for a peacetime and epidemic-related combined air-conditioning unit, which is applied to the above-mentioned peacetime and epidemic-related combined air-conditioning unit, wherein the method includes: detecting indoor air quality parameters, and determining the indoor environmental mode according to the air quality parameters; wherein the environmental mode includes: normal mode, epidemic mode, and severe epidemic mode; under different environmental modes, executing corresponding control strategies to adjust the indoor air quality.

[0014] Furthermore, the air quality parameter includes at least one of the following: virus type and virus content.

[0015] Furthermore, determining the indoor environmental mode according to the air quality parameters includes: determining the corresponding environmental mode according to the number range of the virus types and the range of the virus content.

[0016] Furthermore, in different environmental modes, corresponding control strategies are implemented to adjust the indoor air quality, including:

[0017] In the normal mode, an internal circulation refrigeration control strategy is executed: the first valve and the sixth valve are controlled to be opened, and the second valve, the third valve, the fourth valve, and the fifth valve are controlled to be closed;

[0018] In the epidemic state mode, the air purification and fresh air supply control strategy is executed: the second valve, the third valve, the fifth valve, and the sixth valve are controlled to be opened, and the first valve and the fourth valve are controlled to be closed;

[0019] In the severe epidemic state mode, the fresh air negative pressure control strategy is implemented: the third valve, the fourth valve, the fifth valve, and the sixth valve are controlled to be open, and the first valve and the second valve are controlled to be closed.

[0020] Furthermore, the method further comprises: in the normal mode, the direct expansion outdoor unit provides a cold source for the direct expansion heat exchanger, and the direct expansion heat exchanger serves as an evaporator to provide indoor cooling.

[0021] Furthermore, the method also includes: in the epidemic state mode, the direct expansion heat exchanger acts as a condenser to heat the air, and the three-medium heat exchanger acts as an evaporator to cool and dehumidify the air.

[0022] Furthermore, in the epidemic state mode, after executing the air purification and fresh air supply control strategy, the method also includes: controlling the first valve to open to form a secondary return air air conditioning system.

[0023] Furthermore, the method also includes: in the severe epidemic state mode, controlling the air volume of the exhaust fan to ensure that the indoor exhaust air volume is greater than the fresh air volume, so as to maintain a negative pressure state indoors.

[0024] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program implements the above method when executed by a processor.

[0025] By applying the technical solution of the present invention, a new air-conditioning system for conversion from normal to epidemic is proposed to adapt the air-conditioning system to different epidemic levels (or flu levels). The low-temperature refrigeration section of the innovative combined air-conditioning of the present invention adopts a three-medium heat exchanger structure, and the air supply unit adopts a direct expansion heat exchanger and an air supply power fan structure. The water system and the direct expansion system are linked to control to adapt to a variety of epidemic environments, improve the adaptability of the air-conditioning system to the external environment, and adapt to the air purification and adjustment system under complex epidemic environments. The control scheme of the air-conditioning unit combined with normal and epidemic provided by the present invention can achieve an adapted air-conditioning system form through different controls according to the different levels of the epidemic. In the face of an epidemic outbreak or a sudden outbreak of influenza, the normal-epidemic conversion of the air-conditioning system can quickly switch and respond. Low-cleanliness adaptation is adopted according to mild epidemics, and efficient purification adaptation can be performed in the face of severe epidemics, so as to respond flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural schematic diagram of a peace-and-epidemic combined air-conditioning unit according to an embodiment of the present invention;

[0027] Figure 2 4 is a flow chart of a method for controlling an air-conditioning unit combined with normal epidemic prevention according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1: Pingyi combined air-conditioning cabinet, 101: three-media heat exchanger, 102: humidifier, 103: high-efficiency filter, 2: Pingyi exhaust fan, 202: exhaust filter, 3: direct expansion air supply unit, 301: direct expansion heat exchanger, 4: return air unit, 5: direct expansion outdoor unit, V1, V2, V3, V4: control air valve, V5, V6: direct expansion control valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0032] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0034] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0035] The optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] Example 1

[0037] This embodiment innovates a peace and epidemic air-conditioning system consisting of a peace and epidemic combined air-conditioning cabinet equipped with a three-medium heat exchanger based on a peace and epidemic combination environment. The system can adapt to different air-conditioning system forms according to various peace and epidemic levels, thereby achieving energy-saving and efficient operation in mild epidemics, and ensuring high-cleanliness operation and negative pressure conversion in severe epidemics.

[0038] Figure 1 FIG. 2 is a schematic diagram of the structure of a combined air conditioning unit according to an embodiment of the present invention. Figure 1As shown, the air conditioning unit combined with the epidemic prevention system includes: a direct expansion air supply unit for indoor air supply, and a return air unit for indoor return air; and also includes: an exhaust fan connected to the return air unit. The air conditioning cabinet is connected to the direct expansion air supply unit and the return air unit, and performs air conditioning by inhaling fresh air and return air, and then sends the air into the room. The air conditioning cabinet has a built-in three-medium heat exchanger, which is a heat exchanger that exchanges heat between three media in pairs (the existing air conditioning system is an ordinary coil heat exchanger). One end of the three-medium heat exchanger is connected to the chilled water system through a chilled water pipeline, and one end is connected to the direct expansion outdoor unit through a refrigerant pipeline. The gas pipeline connected to one end is divided into two gas branches, the first gas branch is connected to the direct expansion air supply unit, and the second gas branch is connected to the return air unit. The refrigerant pipeline connected to the direct expansion outdoor unit is divided into two refrigerant branches, the first refrigerant branch is connected to the three-medium heat exchanger, and the second refrigerant branch is connected to the direct expansion air supply unit.

[0039] Figure 1 The dotted line in the middle is the multi-split pipeline (the pipeline contains refrigerant), the solid line is the chilled water pipeline (the pipeline contains chilled water), and the double-line pipeline contains air / gas.

[0040] This embodiment proposes a new air conditioning system for normal and epidemic conversion, and adapts the air conditioning system to different epidemic levels. This embodiment innovates the low-temperature refrigeration section of the combined air conditioner to adopt a three-medium heat exchanger structure and the air supply unit to adopt a direct expansion heat exchanger and air supply power fan structure. Through the linkage control of the water system and the direct expansion system, it adapts to various epidemic environments, improves the adaptability of the air conditioning system to the external environment, and adapts to the air purification and adjustment system under complex epidemic environments.

[0041] In order to adapt the air-conditioning system to different epidemic levels, it is necessary to set valves on the pipelines, and control the opening and closing of the valves to achieve different air-conditioning system pipelines adapted to different epidemic levels. Specifically, a first valve is set on the second gas branch; the air-conditioning cabinet is provided with an air inlet, and a second valve is set on the pipeline between the air inlet and the return air unit; a third valve is set on the pipeline for quality inspection of the exhaust fan and the return air unit; a fifth valve is set on the first refrigerant branch; and a sixth valve is set on the second refrigerant branch. At different epidemic levels, the control of the above valves can realize the conduction of different pipelines, thereby realizing different air-conditioning systems adapted to different epidemic levels.

[0042] The exhaust fan of this embodiment is provided with a first exhaust port and a second exhaust port. The first exhaust port is connected to the return air unit for direct exhaust. A fourth valve and an exhaust filter are provided between the first exhaust port and the second exhaust port. In the existing air conditioning system, the exhaust fan is only provided with one exhaust port, namely the second exhaust port mentioned above. The exhaust fan of this embodiment is also provided with a first exhaust port. When the epidemic is not serious, the indoor air transported by the return air unit can be directly discharged through the first exhaust port without filtering before being discharged, thus saving the filtering link and improving the indoor air circulation efficiency. It can well cope with the exhaust needs of different environments.

[0043] The direct expansion air supply unit has a built-in direct expansion heat exchanger for temperature control, thereby ensuring the comfort of indoor air supply. A humidifier and a filter are arranged between the three-medium heat exchanger and the air inlet of the air conditioning cabinet to humidify and filter the air.

[0044] The Pingyi combined air conditioning cabinet in this embodiment is a device for air conditioning, which can inhale fresh air and return air, mix the two for efficient filtration, humidification, low-temperature dehumidification, and then send them into the room. The Pingyi combined air conditioning cabinet innovatively adds a three-medium heat exchanger structure, optimizes the conventional coil-type functional section, and forms a three-medium functional section. This structure is located at the front end of the air outlet and connects two different cold sources.

[0045] The epidemic exhaust fan sucks in indoor air and exhausts it through the fan. The device consists of two exhaust outlets, the first type exhausts directly, and the second type exhausts after high-efficiency filtration. Figure 1 As shown, it can cope well with the exhaust requirements of different environments. The direct expansion air supply unit mainly supplies air to the indoor space, with a built-in independent fan to provide power, and a built-in direct expansion heat exchanger (only one medium: refrigerant, which can be used as a condenser, can provide cooling in normal mode and heating in epidemic mode) capable of temperature regulation. The return air unit is equipped with an independent fan to provide power and a primary filter for primary filtration. The direct expansion outdoor unit is the source of cold and heat for the three-medium heat exchanger and the direct expansion heat exchanger. The unit can switch modes by changing different direct expansion control valves. The existing outdoor unit is directly connected to the heat exchanger. The direct expansion outdoor unit of this embodiment innovates the system form, connecting the three-medium heat exchanger and the direct expansion air supply unit, and implementing a new control method in this innovative form.

[0046] Example 2

[0047] According to an embodiment of the present invention, an embodiment of a control method for an air-conditioning unit combined with a normal epidemic is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0048] Figure 2 FIG. 1 is a flow chart of a method for controlling an air-conditioning unit combined with a normal epidemic according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0049] Step S201, detecting indoor air quality parameters, and determining indoor environmental modes according to the air quality parameters; wherein the environmental modes include: normal mode, epidemic mode, and severe epidemic mode;

[0050] Step S202: Under different environmental modes, execute corresponding control strategies to adjust indoor air quality.

[0051] The control scheme of air conditioning units combined with epidemic prevention provided in this embodiment can achieve the form of adaptive air conditioning system through different controls according to the different degrees of epidemic. In the face of an epidemic outbreak or a sudden outbreak of influenza, the air conditioning system's epidemic prevention conversion can quickly switch and respond. Low-cleanliness adaptation is adopted according to mild epidemics, and efficient purification adaptation can be carried out in the face of severe epidemics, and flexible response is achieved.

[0052] The above-mentioned air quality parameters include at least one of the following: virus types and virus content. When determining the indoor environmental mode according to the air quality parameters, the corresponding environmental mode is determined according to the number range of virus types and the range of virus content. For the number of virus types, normal mode < epidemic state mode < severe epidemic state mode, and for the virus content, normal mode < epidemic state mode < severe epidemic state mode. The virus types, the number range of virus types, and the range of virus content corresponding to the normal mode, epidemic state mode, and severe epidemic state mode can be pre-set. The epidemic mentioned in this embodiment may also be other viruses such as influenza.

[0053] This embodiment divides the epidemic situation into three states, namely, normal state, epidemic state, and severe epidemic state. According to the HVAC requirements of the three different states, the air conditioning form of each state is very different. This embodiment currently performs relevant adaptation for the environment of the hospital inpatient ward, and the specific control is as follows:

[0054] (1) Normal mode: In general inpatient wards, internal circulation cooling is routinely used. The system will open the V1 and V6 control valves and close the remaining control valves. At this time, the direct expansion outdoor unit provides the cold source for the direct expansion heat exchanger, and the direct expansion heat exchanger becomes the evaporator to provide indoor cooling. The indoor air conditioning system is in the form of an internal circulation air system. The air circulation power is provided by the independent fans of the supply air unit and the return air unit to complete the control of the entire system.

[0055] Based on this, this embodiment implements the internal circulation refrigeration control strategy in the normal mode: the first valve and the sixth valve are controlled to be open, and the second valve, the third valve, the fourth valve, and the fifth valve are controlled to be closed. In the normal mode, the direct expansion outdoor unit provides a cold source for the direct expansion heat exchanger, and the direct expansion heat exchanger serves as an evaporator to cool the room. Accordingly, in the normal mode, only the indoor internal circulation refrigeration needs to be performed to meet the indoor environment requirements.

[0056] (2) Epidemic state mode: After an epidemic breaks out, the inpatient ward needs to be efficiently purified and supplied with fresh air. At this time, the system of the present invention will open V2 (the air inlet of the air conditioning cabinet is used to supplement fresh air), V3, V5, and V6. At this time, the indoor air passes through the primary filtration and V2 and V3 to adjust the return air volume and exhaust air volume. The return air enters the combined air conditioning cabinet and mixes with the fresh air. After high-efficiency filtration, humidification, and dehumidification, it is sent to the air supply unit. The air supply unit is heated and finally sent to the inpatient ward. The exhaust air is directly discharged to the outside through the exhaust fan. In this mode, the direct expansion heat exchanger is used as a condenser to heat the air, and the third medium of the three-medium heat exchanger is used as an evaporator to cool and dehumidify the air. In order to ensure independent control of temperature and humidity, the dehumidification amount and heating amount do not match. The outdoor multi-split unit is based on the heating amount of the direct expansion heat exchanger. At this time, the lack of cooling and dehumidification is compensated by the chilled water of the three-medium heat exchanger to ensure independent control of temperature and humidity. In order to improve the energy efficiency of the system, V1 can be turned on based on this mode. At this time, it becomes a secondary return air air-conditioning system, which provides part of the return air heat to the air outlet of the combination cabinet and recovers part of the return air heat. This energy-saving mode will affect the filtration level and can be selected according to the epidemic situation.

[0057] Based on this, this embodiment implements the air purification and fresh air supply control strategy in the epidemic state mode: control the second valve, the third valve, the fifth valve, and the sixth valve to open, and control the first valve and the fourth valve to close. On this basis, the first valve can be controlled to open to form a secondary return air conditioning system. In the epidemic state mode, the direct expansion heat exchanger is used as a condenser to heat the air, and the three-medium heat exchanger is used as an evaporator to cool and dehumidify the air. Accordingly, in the epidemic state mode, both air purification and fresh air supply can be performed to achieve the circulation, renewal and purification of indoor air.

[0058] (3) Severe epidemic state mode: If the epidemic state is upgraded to a more serious level, the system of the present invention will adopt a fresh air negative pressure air conditioning system for adaptation. The system opens V3, V4 (after the virus is filtered through the exhaust filter and then discharged), V5, and V6 valves, and closes the V1 and V2 valves. When V4 is opened, the first air outlet needs to be closed. A valve can be set at the first air outlet, and the first air outlet is closed by closing the valve. Under the above control, the Pingyi combined air conditioning cabinet becomes a fresh air (only from the air inlet above V2) air treatment system, only sucking in outdoor fresh air for high-efficiency filtration, and passing through the three-medium heat exchanger and the direct expansion heat exchanger for independent temperature and humidity control and adjustment to ensure strict cleanliness, temperature, and humidity of the air supply; the Pingyi exhaust fan will open the V4 valve and exhaust all the air through the exhaust high-efficiency filter for delivery, and the original direct exhaust channel will be closed to ensure high cleanliness of the polluted indoor air. The exhaust fan controls the air volume, and the indoor exhaust volume is greater than the fresh air volume, maintaining the indoor negative pressure state, completing the switching of the entire system, and adapting to the environmental requirements of severe epidemics.

[0059] Based on this, this embodiment implements a new air negative pressure control strategy in the severe epidemic state mode: the third valve, the fourth valve, the fifth valve, and the sixth valve are controlled to be open, and the first valve and the second valve are controlled to be closed. In the severe epidemic state mode, the air volume of the exhaust fan is controlled to ensure that the indoor exhaust volume is greater than the fresh air volume to maintain the indoor negative pressure state. Accordingly, in the severe epidemic state mode, the turbid virus gas is no longer discharged, and the new air circulation under the negative pressure state is realized.

[0060] This embodiment can solve the adaptation problem of the air-conditioning system under different degrees of the epidemic, solve the difficulty of mode conversion of the air-conditioning purification system combining peacetime and epidemics, and solve the adaptation problem of different purification and filtration systems in the conversion between peacetime and epidemics.

[0061] Example 3

[0062] This embodiment provides an electronic device, which is used for the control method of the air-conditioning unit combined with the epidemic prevention, and the electronic device includes: at least one processor; and a memory connected to the at least one processor in communication; wherein,

[0063] The memory stores instructions that can be executed by the one processor, and the instructions are executed by the at least one processor so that the at least one processor can: detect indoor air quality parameters, and determine the indoor environmental mode according to the air quality parameters; wherein the environmental mode includes: normal mode, epidemic mode, and severe epidemic mode; under different environmental modes, execute corresponding control strategies to adjust the indoor air quality.

[0064] Example 4

[0065] The embodiment of the present invention provides a software, which is used to execute the technical solutions described in the above embodiment and preferred implementation manner.

[0066] An embodiment of the present invention provides a non-volatile computer storage medium, which stores computer executable instructions. The computer executable instructions can execute the air-conditioning unit control method combined with epidemic prevention in any of the above method embodiments.

[0067] The above-mentioned software is stored in the above-mentioned storage medium, which includes but is not limited to: a CD, a floppy disk, a hard disk, an erasable memory, etc.

[0068] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0069] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0071] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0072] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0073] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been 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 make equivalent replacements for some of the technical features therein. 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. A combined air conditioning unit for peace and epidemic prevention, characterized in that: The combined air conditioning unit comprises: a direct expansion air supply unit for indoor air supply, and an air return unit for indoor air return; and further comprises: An exhaust fan connected to the return air unit; An air conditioning cabinet, connected to the direct expansion air supply unit and the return air unit, performs air conditioning by inhaling fresh air and return air, and then delivers the air into the room; The air conditioning cabinet has a built-in three-medium heat exchanger, one end of the three-medium heat exchanger is connected to the chilled water system through a chilled water pipeline, the other end is connected to the direct expansion outdoor unit through a refrigerant pipeline, and the gas pipeline connected to one end is divided into two gas branches, the first gas branch is connected to the direct expansion air supply unit, and the second gas branch is connected to the return air unit; The refrigerant pipeline connected to the direct expansion outdoor unit is divided into two refrigerant branches, the first refrigerant branch is connected to the three-medium heat exchanger, and the second refrigerant branch is connected to the direct expansion air supply unit.

2. The air conditioning unit combined with normal and epidemic prevention according to claim 1, characterized in that: A first valve is provided on the second gas branch; The air conditioning cabinet is provided with an air inlet, and a second valve is provided on the pipeline between the air inlet and the return air unit; A third valve is provided on the pipeline between the exhaust fan and the return air unit for quality inspection; A fifth valve is provided on the first refrigerant branch; A sixth valve is provided on the second refrigerant branch.

3. The peace and epidemic prevention combined air conditioning unit according to claim 1, characterized in that: The exhaust fan is provided with a first exhaust port and a second exhaust port, wherein the first exhaust port is connected to the return air unit for direct exhaust, and a fourth valve and an exhaust filter are provided between the first exhaust port and the second exhaust port.

4. The peacetime and epidemic prevention combined air conditioning unit according to claim 1, characterized in that: The direct expansion air supply unit has a built-in direct expansion heat exchanger for temperature control.

5. The peacetime and epidemic prevention combined air conditioning unit according to claim 1, characterized in that: A humidifier and a filter are arranged between the three-medium heat exchanger and the air inlet of the air-conditioning cabinet.

6. A control method for a combined normal and epidemic air conditioning unit, applied to the combined normal and epidemic air conditioning unit according to any one of claims 1 to 5, characterized in that: The method comprises: Detecting indoor air quality parameters, and determining indoor environmental modes according to the air quality parameters; wherein the environmental modes include: normal mode, epidemic mode, and severe epidemic mode; Under different environmental modes, corresponding control strategies are implemented to adjust the indoor air quality.

7. The method according to claim 6, characterized in that The air quality parameter includes at least one of the following: virus type and virus content.

8. The method according to claim 7, characterized in that Determining an indoor environment mode according to the air quality parameter includes: The corresponding environmental mode is determined according to the quantity range of the virus types and the range of the virus content.

9. The method according to claim 6, characterized in that In different environmental modes, corresponding control strategies are implemented to adjust indoor air quality, including: In the normal mode, an internal circulation refrigeration control strategy is executed: the first valve and the sixth valve are controlled to be opened, and the second valve, the third valve, the fourth valve, and the fifth valve are controlled to be closed; In the epidemic state mode, the air purification and fresh air supply control strategy is executed: the second valve, the third valve, the fifth valve, and the sixth valve are controlled to be opened, and the first valve and the fourth valve are controlled to be closed; In the severe epidemic state mode, the fresh air negative pressure control strategy is implemented: the third valve, the fourth valve, the fifth valve, and the sixth valve are controlled to be open, and the first valve and the second valve are controlled to be closed.

10. The method according to claim 9, characterized in that The method further comprises: In the normal mode, the direct expansion outdoor unit provides a cold source for the direct expansion heat exchanger, and the direct expansion heat exchanger serves as an evaporator to provide indoor cooling.

11. The method according to claim 9, characterized in that The method further comprises: In the epidemic state mode, the direct expansion heat exchanger acts as a condenser to heat the air, and the three-medium heat exchanger acts as an evaporator to cool and dehumidify the air.

12. The method according to claim 9, characterized in that In the epidemic state mode, after executing the air purification and fresh air supply control strategy, the method further includes: The first valve is controlled to open to form a secondary return air conditioning system.

13. The method according to claim 9, characterized in that The method further comprises: In the severe epidemic state mode, the air volume of the exhaust fan is controlled to ensure that the indoor exhaust air volume is greater than the fresh air volume, so as to maintain the indoor negative pressure state.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 6 to 13 is implemented.

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