Combined air conditioning unit and control method and device

Abstract

The application relates to a combined air conditioning unit and a control method and device, wherein the method comprises the following steps: obtaining mixed air temperature in the unit and outdoor fresh air temperature, and adjusting unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature. In the application, the mixed air temperature is the mixed air temperature after indoor return air and outdoor fresh air are mixed, and the fresh air temperature is the fresh air temperature of outdoor fresh air. By adjusting the unit output of the combined air conditioning unit according to the obtained outdoor fresh air temperature and the mixed air temperature in the unit, when the outdoor fresh air temperature is high but the mixed air temperature in the unit can meet the user set temperature, the unit output can be appropriately reduced by closing a surface cooler, and when the outdoor fresh air temperature can meet the user set temperature, the unit output can also be appropriately reduced. Therefore, the technical scheme in the application can automatically adjust the unit output of the combined air conditioning unit according to the outdoor fresh air temperature and the mixed air temperature in the unit, so that the energy saving property of the combined air conditioning unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning unit, and particularly relates to a combined air conditioning unit and a control method and device. BACKGROUND

[0002] Based on the rapid development of various industries in China, the proportion of refrigeration system cost in total operation cost is increasing. As the main temperature control equipment in existing office buildings, commercial buildings and other buildings, the temperature regulation standard of the combined air conditioning unit is only limited to the user's own feeling to adjust, which leads to poor energy saving of the combined air conditioning unit. SUMMARY

[0003] Therefore, the present application aims to provide a combined air conditioning unit and a control method and device to solve the problem that the user can only adjust the temperature of the combined air conditioning unit according to his own feeling, which leads to poor energy saving of the combined air conditioning unit.

[0004] According to a first aspect of the embodiment of the present application, a combined air conditioning unit is provided, comprising:

[0005] obtaining a mixed air temperature in the unit and a fresh air temperature outdoors;

[0006] adjusting the unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature.

[0007] Preferably, the method further comprises:

[0008] receiving a dangerous gas leakage signal;

[0009] stopping the air circulation of the combined air conditioning unit and the indoor air.

[0010] Preferably, after the air circulation of the combined air conditioning unit and the indoor air is stopped, the method further comprises:

[0011] obtaining an infrared detection image of the indoor;

[0012] when it is judged according to the infrared detection image that the current indoor is in an unoccupied state, constituting the air circulation of the indoor to the combined air conditioning unit and then to the outdoor, and the outdoor to the combined air conditioning unit and then to the indoor.

[0013] Preferably, the adjusting the unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature comprises:

[0014] when the fresh air temperature is lower than a first set temperature and the mixed air temperature is lower than a user set temperature, maintaining the unit output of the combined air conditioning unit and performing heating;

[0015] when the outdoor air temperature is higher than the first set temperature and lower than the second set temperature, and the mixed air temperature meets the user set temperature, reducing the unit output of the combined air conditioning unit and stopping heating;

[0016] when the outdoor air temperature is higher than the second set temperature and lower than the third set temperature, and the outdoor air temperature meets the user set temperature, reducing the unit output of the combined air conditioning unit;

[0017] when the outdoor air temperature is higher than the third set temperature, and the mixed air temperature is higher than the user set temperature, maintaining the unit output of the combined air conditioning unit and performing cooling.

[0018] Preferably, the stopping the air circulation between the indoor and the combined air conditioning unit comprises:

[0019] closing the return air unit, the return air valve, the supply air unit and the supply air valve in the combined air conditioning unit.

[0020] Preferably, the constituting the air circulation from the indoor to the combined air conditioning unit to the outdoor, from the outdoor to the combined air conditioning unit to the indoor comprises:

[0021] closing the stop valve in the combined air conditioning unit, and opening the return air unit, the return air valve, the exhaust air valve, the fresh air valve, the filtering device, the supply air unit and the supply air valve in the combined air conditioning unit to constitute the air circulation from the indoor to the combined air conditioning unit to the outdoor, from the outdoor to the combined air conditioning unit to the indoor.

[0022] Preferably, the maintaining the unit output of the combined air conditioning unit and performing heating when the outdoor air temperature is lower than the first set temperature, and the mixed air temperature is lower than the user set temperature comprises:

[0023] closing the exhaust air valve and the resistance reduction valve in the combined air conditioning unit, opening the return air unit, the return air valve, the fresh air valve, the stop valve, the filtering device, the supply air unit and the supply air valve in the combined air conditioning unit, and controlling the surface air cooler to perform heating.

[0024] Preferably, the reducing the unit output of the combined air conditioning unit and stopping heating when the outdoor air temperature is higher than the first set temperature and lower than the second set temperature, and the mixed air temperature meets the user set temperature comprises:

[0025] closing the exhaust air valve and the surface air cooler in the combined air conditioning unit, opening the return air unit, the return air valve, the fresh air valve, the stop valve, the filtering device, the resistance reduction valve, the supply air unit and the supply air valve in the combined air conditioning unit, and reducing the unit output of the supply air unit.

[0026] Preferably, the reducing the unit output of the combined air conditioning unit when the outdoor air temperature is higher than the second set temperature and lower than the third set temperature, and the outdoor air temperature meets the user set temperature comprises:

[0027] Close the return air fan unit, return air valve, exhaust air valve, stop valve and cooling coil in the combined air conditioning unit, open the fresh air valve, filter device, resistance reducing valve, supply air fan unit and supply air valve in the combined air conditioning unit.

[0028] Preferably, when the fresh air temperature is higher than the third set temperature and the mixed air temperature is higher than the user set temperature, maintaining the unit output of the combined air conditioning unit and performing refrigeration comprises:

[0029] Close the exhaust air valve and resistance reducing valve in the combined air conditioning unit, open the return air fan unit, return air valve, fresh air valve, stop valve, filter device, supply air fan unit and supply air valve in the combined air conditioning unit, and control the cooling coil to perform refrigeration.

[0030] According to a second aspect of the embodiments of the present application, a combined air conditioning unit control device is provided, comprising:

[0031] a processor and a memory;

[0032] The processor and the memory are connected through a communication bus:

[0033] The processor is configured to call and execute the program stored in the memory.

[0034] The memory is configured to store a program, and the program is used to execute the combined air conditioning unit control method according to any one of the above embodiments.

[0035] According to a third aspect of the embodiments of the present application, a combined air conditioning unit is provided, comprising:

[0036] a plurality of functional segments, a first temperature acquisition device for detecting outdoor fresh air temperature and a second temperature acquisition device for detecting mixed air temperature in the unit;

[0037] The first temperature acquisition device is arranged at the functional segment where the outdoor fresh air is introduced.

[0038] The second temperature acquisition device is arranged at the functional segment where the indoor return air and the outdoor fresh air are mixed.

[0039] Preferably, the functional segments comprise at least:

[0040] a return air fan segment configured with a return air fan unit, a return air valve and an exhaust air valve;

[0041] a fresh air segment configured with a fresh air valve and a stop valve;

[0042] a filter segment configured with a filter device;

[0043] a cooling coil segment configured with a cooling coil and a resistance reducing valve;

[0044] The air supply fan section is configured with an air supply fan unit and an air supply valve.

[0045] Preferably, the return air fan section, the fresh air section, the filter section, the surface cooling section and the air supply fan section are connected in sequence.

[0046] Preferably, the return air fan section is connected with the indoor return air outlet through the return air valve and a return air pipeline.

[0047] The exhaust air valve is arranged at the exhaust air outlet of the return air fan section which is in contact with the outdoor.

[0048] The fresh air valve is arranged at the fresh air outlet of the fresh air section which is in contact with the outdoor.

[0049] The stop valve is arranged at the fresh air section close to the return air section.

[0050] The filter device is arranged at the filter section close to the fresh air section.

[0051] The resistance reduction valve and the surface cooler are arranged side by side at the filter section and the surface cooling section close to each other.

[0052] The air supply fan section is connected with the indoor air supply outlet through the air supply valve and an air supply pipeline.

[0053] Preferably, the return air valve and the fresh air valve are both configured with an air volume regulator.

[0054] Preferably, the air conditioning system further comprises:

[0055] A fuse valve arranged at the indoor return air outlet.

[0056] The fuse valve comprises a fuse block, a fuse air valve and a fuse air valve actuator.

[0057] The fuse block is arranged outside the fuse valve.

[0058] The fuse air valve actuator is connected with the fuse block and the fuse air valve respectively.

[0059] Preferably, the air conditioning system further comprises:

[0060] An infrared detection device arranged indoors.

[0061] Preferably, the first temperature acquisition device is arranged at the fresh air valve.

[0062] The second temperature acquisition device is arranged at the filter section.

[0063] The technical scheme provided in the application can have the following beneficial effects: the mixed air temperature obtained in the application is the mixed air temperature after mixing of indoor return air and outdoor fresh air, and the fresh air temperature of the outdoor fresh air. In the embodiment, the outdoor fresh air temperature and the mixed air temperature in the unit are obtained to adjust the unit output of the combined air conditioning unit. For example, when the outdoor fresh air temperature is high but the mixed air temperature in the unit can meet the user set temperature, the unit output can be appropriately reduced by closing the surface cooler. When the outdoor fresh air temperature can meet the user set temperature, the unit output can also be appropriately reduced. Based on this, the technical scheme in the application can automatically adjust the unit output of the combined air conditioning unit according to the outdoor fresh air temperature and the mixed air temperature in the unit, thereby improving the energy saving of the combined air conditioning unit.

[0064] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0065] The accompanying drawings, which are incorporated into the specification and constitute part of it, illustrate embodiments consistent with the application and, together with the specification, serve to explain the principles of the application.

[0066] Figure 1 is a structural schematic diagram of a combined air conditioning unit according to an exemplary embodiment;

[0067] Figure 2 is a structural schematic diagram of a combined air conditioning unit according to another exemplary embodiment;

[0068] Figure 3 is a structural block diagram of a fuse air valve in a combined air conditioning unit according to an exemplary embodiment;

[0069] Figure 4 is a flow schematic diagram of a combined air conditioning unit control method according to an exemplary embodiment;

[0070] Figure 5 is a structural block diagram of a combined air conditioning unit control device according to an exemplary embodiment.

[0071] Reference signs: function section-1; return air fan section-11; return air fan unit-111; return air valve-112; exhaust air valve-113; fresh air section-12; fresh air valve-121; stop valve 122; filtration section-13; filtration device-131; surface cooling section-14; surface cooler-141; resistance reducing valve-142; supply air fan section-15; supply air fan unit-151; supply air valve-152; first temperature acquisition device-2; second temperature acquisition device-3; fuse valve-4; fuse block-41; fuse air valve-42; fuse air valve actuator-43; infrared detection device-5; processor 21 and memory 22. Detailed Implementation

[0072] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0073] Example 1

[0074] Figure 1 This is a flowchart illustrating a control method for a combined air conditioning unit according to an exemplary embodiment, with reference to... Figure 1 A control method for a combined air conditioning unit, comprising:

[0075] Step S1: Obtain the mixed air temperature inside the unit and the fresh air temperature outside;

[0076] Step S2: Adjust the unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature.

[0077] It is understood that the temperature obtained in this embodiment is the mixed air temperature after the indoor return air and outdoor fresh air are mixed, as well as the fresh air temperature of the outdoor fresh air. In this embodiment, the unit output of the combined air conditioning unit is adjusted by obtaining the outdoor fresh air temperature and the mixed air temperature inside the unit. For example, if the outdoor fresh air temperature is high, but the mixed air temperature inside the unit can meet the user's set temperature, the unit output can be appropriately reduced by turning off the cooling coil. Similarly, if the outdoor fresh air temperature can meet the user's set temperature, the unit output can also be appropriately reduced. Based on this, the technical solution in this application can automatically adjust the unit output of the combined air conditioning unit according to the outdoor fresh air temperature and the mixed air temperature inside the unit, thereby improving the energy efficiency of the combined air conditioning unit.

[0078] It should be noted that the specific adjustments to the unit output of the combined air conditioning unit are based on the mixed air temperature and the fresh air temperature, including:

[0079] When the fresh air temperature is lower than the first set temperature and the mixed air temperature is lower than the user set temperature, the unit output of the combined air conditioning unit is maintained and heating is performed.

[0080] When the fresh air temperature is higher than the first set temperature but lower than the second set temperature, and the mixed air temperature meets the user's set temperature, the unit output of the combined air conditioning unit is reduced and heating is stopped.

[0081] When the fresh air temperature is higher than the second set temperature but lower than the third set temperature, and the fresh air temperature meets the user's set temperature, reduce the unit output of the combined air conditioning unit;

[0082] When the outdoor air temperature is higher than the third set temperature and the mixed air temperature is higher than the user set temperature, the unit output of the combined air conditioning unit is maintained and refrigeration is performed.

[0083] The combined air conditioning unit to which the technical solution in the embodiment is applied includes a return air unit 111, a return air valve 112, an exhaust air valve 113, a fresh air valve 121, a stop valve 122, a filtering device 131, a cooling coil 141, a resistance reducing valve 142, a supply air unit 151, and a supply air valve 152, which are taken as examples:

[0084] 1) When the outdoor air temperature is lower than the first set temperature and the mixed air temperature is lower than the user set temperature, the exhaust air valve 113 and the resistance reducing valve 142 are closed, and the return air unit 111, the return air valve 112, the fresh air valve 121, the stop valve 122, the filtering device 131, the supply air unit 151, and the supply air valve 152 are opened, and the cooling coil 141 is controlled to perform heating.

[0085] The control strategy is executed when it is identified that the outdoor fresh air temperature is too low and the mixed air temperature is also lower than the user set temperature. At this time, by closing the exhaust air valve 113 and the resistance reducing valve 142, and opening the return air unit 111, the return air valve 112, the fresh air valve 121, the stop valve 122, the filtering device 131, the supply air unit 151, and the supply air valve 152, the indoor return air is not discharged to the outdoor through the exhaust air valve 113, the indoor return air is mixed with the outdoor fresh air through the stop valve 122, the mixed air is filtered through the filtering device 131, and since the resistance reducing valve 142 is closed at this time, the mixed air can only pass through the cooling coil 141 to reach the supply air unit 151, the cooling coil 141 assists in heating the temperature of the mixed air flow with hot water, and the supply air unit 151 sends the heated mixed air into the indoor.

[0086] 2) When the outdoor air temperature is higher than the first set temperature and lower than the second set temperature, and the mixed air temperature meets the user set temperature, the exhaust air valve 113 and the cooling coil 141 are closed, and the return air unit 111, the return air valve 112, the fresh air valve 121, the stop valve 122, the filtering device 131, the resistance reducing valve 142, the supply air unit 151, and the supply air valve 152 are opened.

[0087] The control strategy is executed when it is identified that the outdoor fresh air temperature is low, but the mixed air temperature meets the user set temperature. At this time, the exhaust air valve 113 and the cooling coil 141 are closed, the return air fan unit 111, the return air valve 112, the fresh air valve 121, the stop valve 122, the filtering device 131, the resistance reducing valve 142, the supply air fan unit 151 and the supply air valve 152 are opened, so that the indoor return air is not discharged to the outdoor through the exhaust air valve 113, the indoor return air is mixed with the outdoor fresh air through the stop valve 122, the mixed air is filtered through the filtering device 131, and since the resistance reducing valve 142 is opened at this time, the airflow resistance through the cooling coil 141 is greater than the resistance through the resistance reducing valve 142, the mixed air can pass through the resistance reducing valve 142 to reach the supply air fan unit 151, and since the internal resistance of the airflow is reduced, the input power of the supply air fan unit 151 can be effectively reduced, thereby improving the energy saving of the combined air conditioning unit.

[0088] 3) When the fresh air temperature is higher than the second set temperature and lower than the third set temperature, and the fresh air temperature meets the user set temperature, the return air fan unit 111, the return air valve 112, the exhaust air valve 113, the stop valve 122 and the cooling coil 141 are closed, and the fresh air valve 121, the filtering device 131, the resistance reducing valve 142, the supply air fan unit 151 and the supply air valve 152 are opened.

[0089] The control strategy is executed when it is identified that the outdoor fresh air temperature meets the user set temperature. At this time, the return air fan unit 111, the return air valve 112, the exhaust air valve 113, the stop valve 122 and the cooling coil 141 are closed, and the fresh air valve 121, the filtering device 131, the resistance reducing valve 142, the supply air fan unit 151 and the supply air valve 152 are opened. At this time, the indoor return air is not introduced, only the outdoor fresh air is filtered through the filtering device 131, since the resistance reducing valve 142 is opened at this time, the airflow resistance through the cooling coil 141 is greater than the resistance through the resistance reducing valve 142, the outdoor fresh air can pass through the resistance reducing valve 142 to reach the supply air fan unit 151, since the internal resistance of the airflow is reduced, the input power of the supply air fan unit 151 can be effectively reduced, and at this time the return air fan unit 111 stops working, the input power is 0, which can greatly reduce the input power of the entire unit, thereby improving the energy saving of the combined air conditioning unit.

[0090] 4) When the fresh air temperature is higher than the third set temperature, and the mixed air temperature is higher than the user set temperature, the exhaust air valve 113 and the resistance reducing valve 142 are closed, the return air fan unit 111, the return air valve 112, the fresh air valve 121, the stop valve 122, the filtering device 131, the supply air fan unit 151 and the supply air valve 152 are opened, and the cooling coil 141 is controlled to perform refrigeration.

[0091] The control strategy is executed when the outdoor fresh air temperature is too high and the mixed air temperature is also higher than the user set temperature. At this time, by closing the exhaust air valve 113 and the resistance reduction valve 142, opening the return air fan unit 111, the return air valve 112, the fresh air valve 121, the stop valve 122, the filtering device 131, the supply air fan unit 151 and the supply air valve 152, the indoor return air is not discharged to the outdoor through the exhaust air valve 113, the indoor return air is mixed with the outdoor fresh air through the stop valve 122, and the mixed air is filtered through the filtering device 131. Since the resistance reduction valve 142 is closed at this time, the mixed air can only pass through the cooling coil 141 to reach the supply air fan unit 151, the cooling coil 141 passes cold water to assist in reducing the temperature of the mixed air flow, and the supply air fan unit 151 sends the cooled mixed air into the indoor.

[0092] It should be noted that the above embodiment is only an example of a combined air conditioning unit structure, and the corresponding control strategy is explained and described. In specific implementation, the control strategy can be adjusted according to the specific structure of the combined air conditioning unit to achieve the effect of adjusting the unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature.

[0093] Embodiment two

[0094] The combined air conditioning unit control method in this embodiment further comprises:

[0095] receiving a dangerous gas leakage signal;

[0096] stopping the air circulation of the combined air conditioning unit and the indoor.

[0097] In this embodiment, the dangerous gas in the indoor can be detected by a dangerous gas detection module, and when the dangerous gas leaks in the indoor, the dangerous gas leakage signal sent by the dangerous gas detection module is received. In this embodiment, when the dangerous gas leakage signal is received, the air circulation of the combined air conditioning unit and the indoor is stopped. Specifically, the return air fan unit 111, the return air valve 112, the supply air fan unit 151 and the supply air valve 152 are closed to prevent the dangerous gas from entering the unit.

[0098] In specific practice, after stopping the air circulation of the combined air conditioning unit and the indoor, the method further comprises:

[0099] obtaining an infrared detection image of the indoor;

[0100] when it is judged according to the infrared detection image that the current indoor is in an unoccupied state, the air circulation of the indoor to the combined air conditioning unit to the outdoor, the outdoor to the combined air conditioning unit to the indoor is constituted.

[0101] It should be noted that after the dangerous gas leakage occurs in the room, the air circulation of the combined air conditioning unit and the room needs to be stopped, and the indoor personnel needs to be evacuated in time. In the present embodiment, the infrared detection image of the room can be obtained through the infrared detection device, and then when it is judged that the current room is in an unoccupied state according to the infrared detection image, the air circulation of the room to the combined air conditioning unit to the outdoor, the outdoor to the combined air conditioning unit to the room is formed. Specifically, the air circulation of the room to the combined air conditioning unit to the outdoor, the outdoor to the combined air conditioning unit to the room is realized by closing the stop valve 122, and opening the return air fan unit 111, the return air valve 112, the exhaust air valve 113, the fresh air valve 121, the filtering device 131, the supply air fan unit 151 and the supply air valve 152. In the present embodiment, the air circulation path of the room to the combined air conditioning unit to the outdoor is formed to ensure the discharge of the indoor dangerous gas, and the discharged air can be discharged to the waste gas treatment chamber or directly discharged to the external atmosphere according to the danger degree. On the other hand, the air circulation path of the outdoor to the combined air conditioning unit to the room is formed to realize the introduction of outdoor air, completely update the indoor air quality, and the room to the combined air conditioning unit to the outdoor, the outdoor to the combined air conditioning unit to the room is a complete air circulation.

[0102] Embodiment three

[0103] Figure 2 is a structural block diagram of a combined air conditioning unit control device according to an exemplary embodiment, referring to Figure 2 A combined air conditioning unit control device, comprising:

[0104] A processor 21 and a memory 22;

[0105] The processor 21 and the memory 22 are connected through a communication bus:

[0106] The processor 21 is used to call and execute the program stored in the memory 22;

[0107] The memory 22 is used to store the program, and the program is at least used to execute the combined air conditioning unit control method as in any one of the above embodiments.

[0108] Embodiment four

[0109] Figure 3 is a structural schematic diagram of a combined air conditioning unit according to an exemplary embodiment, referring to Figure 3 A combined air conditioning unit, comprising:

[0110] A plurality of functional sections 1, and a first temperature acquisition device 2 for detecting outdoor fresh air temperature and a second temperature acquisition device 3 for detecting mixed air temperature in the unit;

[0111] The first temperature collection device 2 is arranged at the functional section where the outdoor fresh air is introduced.

[0112] The second temperature collection device 3 is arranged at the functional section where the indoor return air and the outdoor fresh air are mixed.

[0113] It should be noted that the first temperature collection device 2 and the second temperature collection device 3 can be temperature sensors or other temperature collection devices.

[0114] It can be understood that the combined air conditioning unit in the embodiment comprises a plurality of functional sections 1, a first temperature collection device 2 for detecting the temperature of the outdoor fresh air, and a second temperature collection device 3 for detecting the temperature of the mixed air in the unit; the first temperature collection device 2 is arranged at the functional section where the outdoor fresh air is introduced; and the second temperature collection device 3 is arranged at the functional section where the indoor return air and the outdoor fresh air are mixed. Generally, the combined air conditioning unit comprises a return air fan section 11 for introducing indoor return air and a fresh air section 12 for introducing outdoor fresh air. In the embodiment, the temperature of the outdoor fresh air and the temperature of the mixed air in the unit are detected by arranging temperature collection devices in the combined air conditioning unit, so that the user can manually or automatically control the unit to execute a corresponding control strategy according to the temperature of the outdoor fresh air and the temperature of the mixed air in the unit. For example, when the temperature of the outdoor fresh air is high but the temperature of the mixed air in the unit meets the user's set temperature, the unit output can be appropriately reduced by closing the surface cooler 141. When the temperature of the outdoor fresh air meets the user's set temperature, the unit output can also be appropriately reduced. Based on this, the technical solution in the application can adjust the temperature of the combined air conditioning unit according to the temperature of the outdoor fresh air and the temperature of the mixed air in the unit, thereby improving the energy saving of the combined air conditioning unit.

[0115] It should be noted that, with reference to Figure 4 the functional section 1 of the combined air conditioning unit in the embodiment at least comprises:

[0116] a return air fan section 11 provided with a return air fan unit 111, a return air valve 112, and an exhaust air valve 113;

[0117] a fresh air section 12 provided with a fresh air valve 121 and a stop valve 122;

[0118] a filter section 13 provided with a filter device 131;

[0119] a surface cooling section 14 provided with a surface cooler 141 and a resistance reducing valve 142;

[0120] a supply air fan section 15 provided with a supply air fan unit 151 and a supply air valve 152.

[0121] In the specific practice, the return air fan section 11, the fresh air section 12, the filter section 13, the surface cooling section 14 and the supply air fan section 15 are connected in sequence.

[0122] In the specific practice, the return air fan section 11 is connected with the indoor return air outlet through the return air valve 112 and the return air pipeline.

[0123] The exhaust air valve 113 is arranged at the exhaust air outlet of the return air fan section 11 which contacts the outdoor.

[0124] The fresh air valve 121 is arranged at the fresh air outlet of the fresh air section 12 which contacts the outdoor.

[0125] The stop valve is arranged at the position of the fresh air section close to the return air section.

[0126] The filter device is arranged at the position of the filter section close to the fresh air section.

[0127] The resistance reducing valve and the surface cooler are arranged side by side at the position close to the filter section and the surface cooling section.

[0128] The supply air fan section 15 is connected with the indoor supply air outlet through the supply air valve 152 and the supply air pipeline.

[0129] It should be noted that the return air fan set 111 and the supply air fan set 151 in the embodiment are power components. The return air fan set 111 is connected with the indoor return air outlet through the return air valve 112 and the return air pipeline to introduce the indoor return air. The supply air fan set 151 is connected with the indoor supply air outlet through the supply air valve 152 and the supply air pipeline to supply air to the indoor.

[0130] It should be noted that the return air valve 112 is configured with an air volume regulator, so that the return air valve 112 can be used as a proportional air valve to adjust the opening angle of the air valve. The smaller the opening angle of the air valve, the greater the resistance, and the smaller the air volume passing through. The greater the opening angle of the air valve, the smaller the resistance, and the greater the air volume passing through. The return air valve 112 selects a proportional air valve because it needs to be adjusted to control the proportion of return air entering the internal set.

[0131] It should be noted that the exhaust air valve 113 is arranged at the exhaust air outlet of the return air fan section 11 which contacts the outdoor, and can be used to exhaust the return air of the return air fan section 11 to the outdoor when the stop valve 122 is closed.

[0132] It should be noted that the fresh air valve 121 is arranged at the fresh air outlet of the fresh air section 12 which contacts the outdoor, and can be used to introduce outdoor fresh air. Furthermore, the fresh air valve 121 is configured with an air volume regulator, so that the fresh air valve 121 can be used as a proportional air valve to adjust the opening angle of the air valve. The smaller the opening angle of the air valve, the greater the resistance, and the smaller the air volume passing through. The greater the opening angle of the air valve, the smaller the resistance, and the greater the air volume passing through. The fresh air valve 121 selects a proportional air valve because it needs to be adjusted to control the proportion of fresh air entering the internal set.

[0133] It should be noted that the shutoff valve 122 is arranged between the return air fan section 11 and the fresh air section 12, and is used to cut off the return air from the return air fan section 11 into the fresh air section 12 when closed, and to allow the return air from the return air fan section 11 to enter the fresh air section 12 when opened.

[0134] It should be noted that the filter device 131 is arranged between the fresh air section 12 and the filter section 13, and is used to filter the fresh air entering the pre-fan section, and / or the return air, so as to reduce the impurities in the fresh air, and / or the return air, entering the supply air fan section 15.

[0135] It should be noted that the resistance reducing valve 142 and the surface cooler 141 are arranged side by side between the filter section 13 and the surface cooling section 14, and the surface cooler 141 is used to heat or cool the fresh air entering the pre-fan section, and / or the return air. The resistance reducing valve 142 is used to allow the fresh air, and / or the return air, entering the pre-fan section to flow directly from the resistance reducing valve 142 to the supply air fan section 15 when opened, and to allow the fresh air, and / or the return air, entering the pre-fan section to flow to the supply air fan section 15 only through the surface cooler 141 when closed, i.e. the resistance reducing valve 142 is used to control whether the fresh air, and / or the return air, entering the pre-fan section flows through the surface cooler 141.

[0136] It should be noted that the supply air valve 152 is used as a terminal air valve to control the flow of the fresh air, and / or the return air, entering the pre-fan section to the indoor.

[0137] In specific practice, the first temperature collecting device 2 can be arranged at the fresh air valve 121 to more accurately detect the outdoor fresh air temperature. The second temperature collecting device 3 is arranged at the filter section 13, which is after the fresh air section 12 and before the surface cooling section 14. The second temperature collecting device 3 arranged at the filter section 13 can more accurately detect the mixed air temperature in the unit.

[0138] Example Five

[0139] Figure 4 is a structural schematic diagram of a combined air conditioning unit according to another exemplary embodiment, Figure 5 is a structural block diagram of a fuse air valve in a combined air conditioning unit according to an exemplary embodiment, with reference to Figures 4-5 , the combined air conditioning unit further comprises:

[0140] a fuse valve 4 arranged at an indoor return air inlet;

[0141] The fuse valve 4 comprises a fuse block 41, a fuse air valve 42 and a fuse air valve actuator 43.

[0142] The fuse block 41 is arranged outside the fuse valve 4.

[0143] The fuse air valve actuator 43 is connected to the fuse block 41 and the fuse air valve 42 respectively.

[0144] It can be understood that the fuse valve 4 is composed of the fuse block 41, the fuse air valve 42 and the fuse air valve actuator 43, the fuse block 41 is exposed outside the fuse air valve actuator 43, and the fuse signal inside the fuse air valve actuator 43 is normally closed when the external air cannot react with the fuse block 41, when the dangerous leakage gas exists in the external air, the leakage gas reacts with the fuse block 41, the signal of the fuse block 41 is disconnected, and the fuse air valve actuator 43 closes the fuse air valve 42 immediately after receiving the fuse signal, and feeds back the signal to the user, so that the user can close the air valves (such as the return air valve 112, the return air unit 111, the supply air valve 152 and the supply air unit 151) of each section of the unit according to the fuse signal to prevent the dangerous gas from entering the unit.

[0145] In specific practice, the alarm can also be configured to connect the fuse air valve actuator 43, and the fuse air valve actuator 43 also alarms through the alarm after receiving the fuse signal, so as to prompt the user that there is a dangerous gas leakage risk.

[0146] In specific practice, the fuse block 41 can be replaced with different categories according to different special environments, and the main working mechanism is that the fuse block 41 itself reacts with special gas, changes the physical properties of the fuse block 41 itself, causes the internal power supply mechanism to be damaged, and the common reactive properties are chemical reactions. For example, the sulfur dioxide fuse block 41 can react with hydrogen sulfide gas, the sodium hydroxide fuse block 41 can react with chlorine gas, and the cobalt chloride fuse block 41 can react with ammonia gas.

[0147] Referring to Figure 4 , the combined air conditioning unit further comprises:

[0148] The infrared detection device 5 is arranged in the room.

[0149] It can be understood that after the dangerous gas leakage occurs, the indoor personnel evacuation can be identified by the infrared detection device 5 arranged in the room, and when the indoor personnel evacuation is completed, the user can manually or automatically close the stop valve 122, open the return air valve 112, the exhaust air valve 113, the fresh air valve 121 and the supply air valve 152, and simultaneously open the return air unit 111 and the supply air unit 151. On the one hand, by closing the stop valve 122 and opening the return air valve 112 and the exhaust air valve 113, the indoor return air is discharged, and the discharged air is discharged to the waste gas treatment chamber or directly discharged to the external atmosphere according to the danger degree. On the other hand, by closing the stop valve 122 and opening the fresh air valve 121 and the supply air valve 152, outdoor air is introduced to completely update the indoor air quality.

[0150] It can be understood that the same or similar parts in the above embodiments can be mutually referenced, and the content not described in detail in some embodiments can refer to the same or similar content in other embodiments.

[0151] It should be noted that in the description of the present application, the terms "first", "second" and the like are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is at least two.

[0152] Any process or method descriptions in flow charts or described herein otherwise can be understood as representing code modules, segments, or portions of code that include one or more executable instructions for performing specific logic functions or steps in the process, and the various embodiments of the application contemplate that the modules, segments, or portions of code may, in some embodiments, be implemented in hardware, software, firmware, or any combination thereof. The various embodiments of the application contemplate that the order of the steps in the processes described can be changed, and that additional steps can be added, or some steps can be omitted, without departing from the scope of the application.

[0153] It should be understood that parts of the present application can be realized in hardware, software, firmware, or a combination thereof. In the above embodiments, a plurality of steps or methods can be realized by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized in hardware, and as in another embodiment, it can be realized by any one or a combination of the following technologies known in the art: discrete logic circuit with logic gate circuit for implementing logic functions on data signals, application specific integrated circuit with suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0154] Those skilled in the art of the present technology can understand that all or part of the steps carried out by the above-mentioned embodiment methods can be completed by programs instructing related hardware, and the programs can be stored in a computer readable storage medium, which includes one or a combination of the steps of the method embodiments when executed.

[0155] In addition, each functional unit in each embodiment of the present application can be integrated in one processing module, or each unit can be physically present separately, or two or more units can be integrated in one module. The above integrated module can be realized in the form of hardware or in the form of a software function module. The integrated module, if realized in the form of a software function module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0156] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0157] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0158] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A packaged air conditioning unit control method, comprising: The application is applied to a combined air conditioning unit, and the combined air conditioning unit comprises a fuse valve arranged at an indoor return air inlet; the fuse valve comprises a fuse block, a fuse air valve and a fuse air valve actuator; the fuse block is arranged outside the fuse valve; the fuse air valve actuator is connected to the fuse block and the fuse air valve respectively, and the method comprises the following steps: obtaining a mixed air temperature in the unit and an outdoor fresh air temperature; adjusting a unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature; further comprising the following steps: receiving a dangerous gas leakage signal; stopping air circulation between the combined air conditioning unit and the indoor air; obtaining an infrared detection image of the indoor air; when it is judged that the current indoor air is in an unoccupied state according to the infrared detection image, forming air circulation from the indoor air to the combined air conditioning unit, from the combined air conditioning unit to the outdoor air, from the outdoor air to the combined air conditioning unit and from the combined air conditioning unit to the indoor air.

2. The method of claim 1, wherein, the step of adjusting the unit output of the combined air conditioning unit according to the mixed air temperature and the fresh air temperature comprises the following steps: when the fresh air temperature is lower than a first set temperature and the mixed air temperature is lower than a user set temperature, maintaining the unit output of the combined air conditioning unit and performing heating; when the fresh air temperature is higher than the first set temperature and lower than a second set temperature and the mixed air temperature meets the user set temperature, reducing the unit output of the combined air conditioning unit and stopping heating; when the fresh air temperature is higher than the second set temperature and lower than a third set temperature and the fresh air temperature meets the user set temperature, reducing the unit output of the combined air conditioning unit; when the fresh air temperature is higher than the third set temperature and the mixed air temperature is higher than the user set temperature, maintaining the unit output of the combined air conditioning unit and performing cooling.

3. The method of claim 1, wherein, the step of stopping air circulation between the combined air conditioning unit and the indoor air comprises the following steps: closing a return air unit, a return air valve, a supply air unit and a supply air valve in the combined air conditioning unit.

4. The method of claim 1, wherein, the step of forming air circulation from the indoor air to the combined air conditioning unit, from the combined air conditioning unit to the outdoor air, from the outdoor air to the combined air conditioning unit and from the combined air conditioning unit to the indoor air comprises the following steps: closing a stop valve in the combined air conditioning unit and opening a return air unit, a return air valve, an exhaust air valve, a fresh air valve, a filtering device, a supply air unit and a supply air valve in the combined air conditioning unit to form air circulation from the indoor air to the combined air conditioning unit, from the combined air conditioning unit to the outdoor air, from the outdoor air to the combined air conditioning unit and from the combined air conditioning unit to the indoor air.

5. The method of claim 2, wherein, the step of maintaining the unit output of the combined air conditioning unit and performing heating when the fresh air temperature is lower than the first set temperature and the mixed air temperature is lower than the user set temperature comprises the following steps: closing an exhaust air valve and a resistance reduction valve in the combined air conditioning unit, opening a return air unit, a return air valve, a fresh air valve, a stop valve, a filtering device, a supply air unit and a supply air valve in the combined air conditioning unit and controlling a surface air cooler to perform heating.

6. The method of claim 2, wherein, the step of reducing the unit output of the combined air conditioning unit and stopping heating when the fresh air temperature is higher than the first set temperature and lower than the second set temperature and the mixed air temperature meets the user set temperature comprises the following steps: closing an exhaust air valve and a surface air cooler in the combined air conditioning unit, opening a return air unit, a return air valve, a fresh air valve, a stop valve, a filtering device, a resistance reduction valve, a supply air unit and a supply air valve in the combined air conditioning unit and reducing the unit output of the supply air unit.

7. The method of claim 2, wherein, The method comprises the following steps: When the outdoor air temperature is higher than the second set temperature and lower than the third set temperature, and the outdoor air temperature meets the user set temperature, the unit output of the combined air conditioning unit is reduced, which comprises the following steps:

8. The method of claim 2, wherein, The return air unit, the return air valve, the exhaust air valve, the stop valve and the cooling coil in the combined air conditioning unit are closed, and the outdoor air valve, the filtering device, the resistance reducing valve, the supply air unit and the supply air valve in the combined air conditioning unit are opened. When the outdoor air temperature is higher than the third set temperature and the mixed air temperature is higher than the user set temperature, the unit output of the combined air conditioning unit is maintained and refrigeration is performed, which comprises the following steps:

9. A packaged air handling unit control apparatus, comprising: The exhaust air valve and the resistance reducing valve in the combined air conditioning unit are closed, the return air unit, the return air valve, the outdoor air valve, the stop valve, the filtering device, the supply air unit and the supply air valve in the combined air conditioning unit are opened, and the cooling coil is controlled to perform refrigeration. The method comprises the following steps: A processor and a memory; The processor and the memory are connected through a communication bus: The processor is used to call and execute the program stored in the memory; 10. A packaged air conditioning unit characterized by, The memory is used to store the program, and the program is used to execute the method of claim 1-8. The combined air conditioning unit control device of claim 9 is used to adjust the unit output; the combined air conditioning unit comprises: A plurality of functional segments, a first temperature acquisition device for detecting outdoor air temperature and a second temperature acquisition device for detecting mixed air temperature in the unit; The first temperature acquisition device is arranged at the functional segment where the outdoor air is introduced; 11. The packaged air conditioning unit of claim 10, wherein, The second temperature acquisition device is arranged at the functional segment where the indoor return air and the outdoor air are mixed. The functional segment at least comprises: A return air unit segment provided with a return air unit, a return air valve and an exhaust air valve; An outdoor air segment provided with an outdoor air valve and a stop valve; A filtering segment provided with a filtering device; A cooling segment provided with a cooling coil and a resistance reducing valve; 12. The packaged air conditioning unit of claim 11, wherein, A supply air unit segment provided with a supply air unit and a supply air valve.

13. The packaged air handling unit of any of claims 11-12, wherein, The return air unit segment, the outdoor air segment, the filtering segment, the cooling segment and the supply air unit segment are sequentially connected. The return air unit segment is connected with the indoor return air outlet through the return air valve and the return air pipeline; The exhaust air valve is arranged at the exhaust air outlet of the return air unit segment contacting the outdoor air; The outdoor air valve is arranged at the outdoor air inlet of the outdoor air segment contacting the outdoor air; The stop valve is arranged at the position of the outdoor air segment close to the return air segment; The filtering device is arranged at the position of the filtering segment close to the outdoor air segment; The resistance reducing valve and the cooling coil are arranged side by side at the position close to the filtering segment and the cooling segment; 14. The packaged air handling unit of any of claims 11-12, wherein, The supply air unit segment is connected with the indoor supply air outlet through the supply air valve and the supply air pipeline.

15. The packaged air handling unit of any of claims 10-12, wherein, The return air valve and the outdoor air valve are both provided with an air volume regulator. Further comprising:

16. The packaged air conditioning unit of any of claims 11, 12, wherein, An infrared detection device arranged in the indoor. The first temperature acquisition device is arranged at the outdoor air valve; The second temperature acquisition device is arranged at the filtering segment.

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