A switching control method for a heat pump air conditioner system with a combination mode

Abstract

The present invention provides a switching control method for a heat pump air conditioner system with a combination mode. The method uses a wire controller to work in a cooling + hot water making mode or a heating + hot water making mode. After selecting the mode, the alternating mode or the advanced alternating mode can be selected according to demand. The priority of the mode can also be selected in the alternating mode. Through a heat pump air conditioner system, heating + hot water making and cooling + hot water making operations can be realized simultaneously. The combination mode switching is automatically controlled according to water temperature, user demand and unit assembly status, so that a variety of switching modes are provided for users to choose, thereby satisfying user customization needs to a greater extent.

Description

[Technical field]

[0001] The invention relates to an air conditioner switching control technology, and in particular to a heat pump air conditioner system switching control method with a combination mode. [Background technology]

[0002] In the prior art, most air-conditioning systems and air conditioners generally only work in one mode at the same time, heating, hot water or cooling. However, in summer, for example, users need cooling at home, but still need hot water for taking a shower at night. In this way, users need to switch modes by themselves, and cannot intelligently realize the intelligent combination of multiple modes, resulting in a poor experience.

[0003] At the same time, it is impossible to achieve the functions of air conditioning cooling + hot water making at the same time, and in winter, some spaces need heating and some spaces need hot water making. At this time, the existing air-conditioning system cannot be realized, resulting in relatively few application occasions for the existing air-conditioning system.

[0004] Therefore, there is an urgent need to improve the control mode of the existing air-conditioning system to solve the user's demand for automatic switching control of multiple modes. [Summary of the invention]

[0005] The present invention provides a switching control method for a heat pump air conditioner system with a combination mode, which can meet the user's needs for cooling + hot water, or heating + hot water at the same time, and the mode switching after setting can be automatically realized according to water temperature conditions, user needs, and unit assembly conditions; while the mode switching meets the user's needs, it also minimizes energy consumption, saves electricity, and makes the best use of the compressor to achieve cooling, heating, and hot water needs.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0007] A switching control method for a heat pump air conditioner system with a combination mode, wherein the heat pump air conditioner system comprises a heat pump air conditioner, a wire controller, a cooling / heating unit and a hot water unit, wherein the wire controller is connected to the heat pump air conditioner and is used to control the operation of the entire system, wherein the heat pump air conditioner is provided with a compressor, a fan for heat exchange and cooling, and a heat pump for heat exchange circulation, wherein the heat pump is respectively connected to the cooling / heating unit and the hot water unit through a three-way valve and a buffer water tank, wherein the cooling / heating unit is respectively provided with a floor heating component for heating or a fan coil component for cooling, wherein the hot water unit is provided with a domestic water tank for providing hot water, wherein an electric heater for providing auxiliary electric heating is also installed in the domestic water tank; wherein the wire controller is used to control the system to operate in a cooling+hot water mode or a heating+hot water mode, wherein after selecting the mode, an alternating mode or a high-level alternating mode can be selected according to demand, and the priority of the mode can also be selected in the alternating mode, wherein the switching control method specifically comprises the following steps:

[0008] S1, cooling + hot water mode, the specific operating steps are as follows:

[0009] S1.1, hot water production in alternating mode has priority;

[0010] S1.1.1. Heat pumps are operated with priority to produce hot water;

[0011] S1.1.2, during the operation of hot water production, it is always determined whether the temperature reaches the shutdown state or the maximum temperature of the heat pump hot water production is reached;

[0012] S1.1.3, if the temperature is not reached and the cooling start requirement is met;

[0013] S1.1.4, then start the rapid hot water operation, that is, the heat pump and the electric heating of the domestic water tank work at the same time, reducing the time required for heating hot water;

[0014] S1.1.5, then, the process continues to loop to determine whether the temperature reaches the shutdown state or the maximum temperature of the heat pump water heating is reached. If it does not meet the requirements, the process of looping to perform the rapid water heating in step S1.1.4;

[0015] When the temperature of the domestic water tank reaches the set temperature point for hot water production or the maximum temperature of the hot water of the T1 heat pump, the heat pump will exit the hot water production operation. If it still does not reach the temperature set by the user at this time, the electric heating in the domestic water tank will continue to produce hot water until it reaches the temperature set by the user.

[0016] Until the water temperature reaches the set temperature or the maximum temperature of the heat pump;

[0017] S1.1.6, then the compressor switches to cooling mode;

[0018] S1.1.7, if there is a need to turn on cooling only after the temperature is reached in step S1.1.2, it will be directly switched to cooling mode;

[0019] S1.1.8, the heat pump switches from hot water production to cooling mode;

[0020] During the cooling operation, if there is a demand for the heat pump to start hot water, the compressor will switch back to hot water operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min;

[0021] If the cooling start requirement is not met, continue to maintain the hot water operation in the above steps;

[0022] S1.2, cooling priority in alternating mode;

[0023] S1.2.1, if the system is in cooling operation

[0024] S1.2.2, then it is determined whether the temperature reaching shutdown condition is met;

[0025] S1.2.3, if the temperature reaching shutdown condition is not met and there is a demand for hot water;

[0026] S1.2.4, it is necessary to determine whether the user's domestic water tank is equipped with an electric heating device;

[0027] S1.2.5. If an electric heating device is installed in the user's domestic water tank, the heat pump maintains cooling operation, and the hot water demand is heated by the electric heating in the domestic water tank, and the heat pump maintains cooling operation;

[0028] S1.2.6. If the user's domestic water tank is not equipped with electric heating or other devices that can heat water, the heat pump will operate in cooling mode until the temperature reaches the temperature and the heat pump stops for Bmin before switching to hot water operation; the value range of B is 3-5min;

[0029] S1.2.7, based on step S1.2.3, if the temperature reaches the limit first, shut down;

[0030] S1.2.8, then determine whether there is a demand for hot water, if not, directly return to step S1.2.1;

[0031] S1.2.9, if there is a demand for hot water, it will be directly switched to hot water production;

[0032] S1.2.10, during the hot water operation, if there is a demand to start the heat pump cooling, the compressor will switch back to cooling operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min;

[0033] S1.3, advanced alternation;

[0034] When using advanced alternation, users can set the hot water operation duration t1 and cooling operation duration t2 according to their needs. During the hot water operation, when the heat pump meets the hot water mode temperature shutdown condition, or meets the hot water operation duration, the unit will shut down and the heat pump will exit the hot water operation and switch to the cooling mode; the value range of t1 is 20-60min, and the value range of t2 is 20-60min;

[0035] S1.3.1. If the cooling start conditions are not met, the cooling mode will be set to standby;

[0036] If the hot water demand is met again during standby mode, the system will switch back to hot water operation.

[0037] Then, re-judge;

[0038] S1.3.2. If the cooling start conditions are met, run the cooling;

[0039] After the refrigeration reaches the set temperature or reaches the refrigeration operation time t2, and there is a demand for hot water, it switches to hot water mode;

[0040] If there is no demand for hot water, the cooling mode is maintained in standby or operation;

[0041] S2, heating + hot water mode, the specific operating steps are as follows:

[0042] S2.1, hot water production in alternating mode has priority;

[0043] S2.1.1, the heat pump shall be operated with priority to produce hot water;

[0044] S2.1.2, during the operation of hot water production, it is always determined whether the temperature reaches the shutdown state or the maximum temperature of the heat pump hot water production is reached;

[0045] S2.1.3, if the temperature is not reached and the heating start requirement is met;

[0046] S2.1.4, then start the rapid hot water operation, that is, the heat pump and the electric heating of the domestic water tank work at the same time, reducing the time required for heating hot water;

[0047] S2.1.5, then, keep looping to determine whether the temperature reaches the shutdown state or the maximum temperature of the heat pump water heating is reached. If it cannot be met, loop to perform the rapid water heating in step S2.1.4;

[0048] When the temperature of the domestic water tank reaches the set temperature point for hot water production or the maximum temperature of the hot water of the T1 heat pump, the heat pump will exit the hot water production operation. If it still does not reach the temperature set by the user at this time, the electric heating in the domestic water tank will continue to produce hot water until it reaches the temperature set by the user.

[0049] Until the water temperature reaches the set temperature or the maximum temperature of the heat pump;

[0050] S2.1.6, then, the compressor switches to heating mode operation;

[0051] S2.1.7. If the heating is required only after the temperature is reached in step S2.1.2, the heating mode is switched directly to operate;

[0052] S2.1.8, the heat pump switches from hot water production to heating mode;

[0053] During the heating operation, if there is a demand for the heat pump to start hot water, the compressor will switch back to hot water operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min;

[0054] If the heating start requirement is not met, continue to maintain the hot water operation in the above steps;

[0055] S2.2, heating priority in alternating mode;

[0056] S2.2.1, if the system is in heating operation

[0057] S2.2.2, then it is determined whether the temperature reaching shutdown condition is met;

[0058] S2.2.3, if the temperature reaching shutdown condition is not met and there is a demand for hot water;

[0059] S2.2.4, it is necessary to determine whether the user's domestic water tank is equipped with an electric heating device;

[0060] S2.2.5. If an electric heating device is installed in the user's domestic water tank, the heat pump will maintain heating operation, and the hot water demand will be heated by the electric heating in the domestic water tank, and the heat pump will maintain heating operation;

[0061] S2.2.6. If the user's domestic water tank is not equipped with electric heating or other devices that can heat water, the heat pump will heat up and shut down for Bmin before switching to hot water operation; the value range of B is 3-5min;

[0062] S2.2.7, based on step S2.2.3, if the temperature reaches the limit first, shut down;

[0063] S2.2.8, then determine whether there is a demand for hot water, if not, directly return to step S2.2.1;

[0064] S2.2.9. If there is a demand for hot water, it will be directly switched to hot water production;

[0065] S2.2.10, during the hot water operation, if there is a demand for heat pump heating, the heating operation will be switched back to operation after the compressor minimum operation time Amin is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min;

[0066] S2.3, advanced alternation;

[0067] When using advanced alternation, users can set the hot water operation duration t1 and heating operation duration t3 according to their needs. During the hot water operation, when the heat pump meets the temperature shutdown condition of the hot water mode, or meets the hot water operation duration, the unit will shut down and the heat pump will exit the hot water operation and switch to the heating mode; the value range of t1 is 20-60min, and the value range of t3 is 20-60min;

[0068] S2.3.1. If the heating start condition is not met, the system will be in standby mode according to the heating mode;

[0069] If the hot water demand is met again during standby mode, the system will switch back to hot water operation.

[0070] Then, re-judge;

[0071] S2.3.2. If the heating start condition is met, the heating will be operated;

[0072] After the heating reaches the set temperature or reaches the heating operation time t3, and there is a demand for hot water, it switches to hot water mode;

[0073] If there is no demand for hot water, the heating mode is maintained in standby or operation.

[0074] Furthermore, the maximum temperature of the heat pump water heating is the highest temperature at which the compressor can heat the hot water, and if the maximum temperature is exceeded, the water temperature cannot rise or rises very slowly when the compressor is running alone.

[0075] Furthermore, in the cooling + hot water mode: during cooling, when the upper or lower limit of the cooling environment temperature is exceeded, the hot water mode is switched;

[0076] If the upper or lower limit of the hot water environment temperature is exceeded at the same time, the ambient temperature abnormality protection will be reported and the mode will remain unchanged;

[0077] When heating water, if the upper or lower limit of the hot water temperature is exceeded, the cooling mode will be switched. If the upper or lower limit of the cooling temperature is also exceeded, the abnormal temperature protection will be reported and the current mode will remain unchanged.

[0078] Furthermore, in the heating + hot water mode: when heating, when the upper or lower limit of the heating environment temperature is exceeded, the hot water mode is switched;

[0079] If the upper or lower limit of the hot water environment temperature is exceeded at the same time, the ambient temperature abnormality protection will be reported and the mode will remain unchanged;

[0080] When heating water, if the upper or lower limit of the hot water temperature is exceeded, the heating mode is switched. If the upper or lower limit of the heating temperature is also exceeded, the abnormal temperature protection is reported and the current mode remains unchanged.

[0081] Furthermore, when other faults except abnormal ambient temperature protection occur during the operation of the unit, the unit will not perform mode conversion and the standby state will remain unchanged.

[0082] The beneficial effects of the present invention are:

[0083] In the process of switching air-conditioning control modes, most mode switches need to be performed manually, and it is impossible to intelligently realize the problem of intelligent combination operation of multiple modes. In the present invention, a heat pump air-conditioning system can simultaneously realize heating + hot water making, cooling + hot water making operations, and automatically control the combination mode to automatically switch according to water temperature, user needs and unit assembly conditions. The internal switching logic of the combination mode is intelligently adjusted in real time according to water temperature, user needs, etc. Users can also choose advanced mode according to their needs to set the switching time they need, etc., to realize a variety of switching modes for users to choose, thereby meeting user customization needs to a greater extent.

[0084] Moreover, while mode switching meets user needs, it can minimize energy consumption and save electricity, maximize the use of compressors to meet cooling, heating, and hot water needs, effectively simplify the control mode and reduce the complex installation structure of the equipment.

Brief Description of the Drawings

[0085] Figure 1 It is a schematic diagram of the principle of the heat pump air conditioning system in the present invention;

[0086] Figure 2 This is a control flow chart of the priority of hot water production in the alternating mode of the present invention;

[0087] Figure 3 This is a control flow chart of heating / cooling priority in the alternating mode of the present invention. [Specific implementation method]

[0088] A switching control method for a heat pump air conditioner system with a combination mode, such as Figure 1 As shown, the heat pump air conditioner system includes a heat pump air conditioner 1, a wire controller 2, a cooling / heating unit 3 and a hot water unit 4. The wire controller 2 is connected to the heat pump air conditioner 1 and is used to control the operation of the entire system. The heat pump air conditioner 1 is provided with a compressor 5, a fan 6 for heat exchange and cooling, and a heat pump 7 for heat exchange circulation. The heat pump 7 is respectively connected to the cooling / heating unit 3 and the hot water unit 4 through a three-way valve 8 and a buffer water tank 9. The cooling / heating unit 3 is respectively provided with a floor heating component for heating or a fan 6 coil component for cooling. The hot water unit 4 is provided with a domestic water tank 10 for providing hot water, and an electric heater for providing auxiliary electric heating is also installed in the domestic water tank; the system is controlled by the wire controller 2 to work in a cooling + hot water mode or a heating + hot water mode. After selecting the mode, the alternating mode or the advanced alternating mode can be selected according to the demand. The priority of the mode can also be selected in the alternating mode. The switching control method specifically includes the following steps:

[0089] S1, cooling + hot water mode, the specific operating steps are as follows:

[0090] S1.1, if Figure 2 As shown, hot water production in the alternating mode takes priority;

[0091] S1.1.1. Heat pumps are operated with priority to produce hot water;

[0092] S1.1.2, during the operation of hot water production, it is always determined whether the temperature reaches the shutdown state or the maximum temperature of the heat pump hot water production is reached;

[0093] S1.1.3, if the temperature is not reached and the cooling start requirement is met;

[0094] S1.1.4, then start the rapid hot water operation, that is, the heat pump and the electric heating of the domestic water tank work at the same time, reducing the time required for heating hot water;

[0095] S1.1.5, then, the process continues to loop to determine whether the temperature reaches the shutdown state or the maximum temperature of the heat pump water heating is reached. If it does not meet the requirements, the process of looping to perform the rapid water heating in step S1.1.4;

[0096] When the temperature of the domestic water tank reaches the set temperature point for hot water production or the maximum temperature of the hot water of the T1 heat pump, the heat pump will exit the hot water production operation. If it still does not reach the temperature set by the user at this time, the electric heating in the domestic water tank will continue to produce hot water until it reaches the temperature set by the user.

[0097] Until the water temperature reaches the set temperature or the maximum temperature of the heat pump;

[0098] S1.1.6, then the compressor switches to cooling mode;

[0099] S1.1.7, if there is a need to turn on cooling only after the temperature is reached in step S1.1.2, it will be directly switched to cooling mode;

[0100] S1.1.8, the heat pump switches from hot water production to cooling mode;

[0101] During the cooling operation, if there is a demand for the heat pump to start hot water, the compressor will be switched back to hot water operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; wherein the value range of A is 5-10min, preferably 6min; the value range of B is 3-5min, preferably 4min;

[0102] If the cooling start requirement is not met, continue to maintain the hot water operation in the above steps;

[0103] S1.2, such as Figure 3 As shown, cooling in alternating mode takes priority;

[0104] S1.2.1, if the system is in cooling operation

[0105] S1.2.2, then it is determined whether the temperature reaching shutdown condition is met;

[0106] S1.2.3, if the temperature reaching shutdown condition is not met and there is a demand for hot water;

[0107] S1.2.4, it is necessary to determine whether the user's domestic water tank is equipped with an electric heating device;

[0108] S1.2.5. If an electric heating device is installed in the user's domestic water tank, the heat pump maintains cooling operation, and the hot water demand is heated by the electric heating in the domestic water tank, and the heat pump maintains cooling operation;

[0109] S1.2.6. If the user's domestic water tank is not equipped with electric heating or other devices that can heat water, the heat pump will operate in cooling mode until the temperature reaches the temperature and the heat pump stops for Bmin before switching to hot water operation; the value range of B is 3-5min, preferably 4min;

[0110] S1.2.7, based on step S1.2.2, if the temperature reaches the highest level first, shut down;

[0111] S1.2.8, then determine whether there is a demand for hot water, if not, directly return to step S1.2.1;

[0112] S1.2.9, if there is a demand for hot water, it will be directly switched to hot water production;

[0113] S1.2.10, during the hot water operation, if there is a demand for heat pump cooling, the compressor will switch back to cooling operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, preferably 6min; the value range of B is 3-5min, preferably 4min;

[0114] S1.3, advanced alternation;

[0115] When using advanced alternation, users can set the hot water operation duration t1 and the cooling operation duration t2 according to their needs. During the hot water operation, when the heat pump meets the temperature shutdown condition of the hot water mode, or meets the hot water operation duration, the unit will stop, and the heat pump will exit the hot water operation and switch to the cooling mode; the value range of t1 is 20-60min, preferably 30min; the value range of t2 is 20-60min, preferably 30min;

[0116] S1.3.1. If the cooling start conditions are not met, the cooling mode will be set to standby;

[0117] If the hot water demand is met again during standby mode, the system will switch back to hot water operation.

[0118] Then, re-judge;

[0119] S1.3.2. If the cooling start conditions are met, run the cooling;

[0120] After the refrigeration reaches the set temperature or reaches the refrigeration operation time t2, and there is a demand for hot water, it switches to hot water mode;

[0121] If there is no demand for hot water, the cooling mode is maintained in standby or operation;

[0122] And in the cooling + hot water mode: when cooling, if the upper or lower limit of the cooling environment temperature is exceeded, the hot water mode is switched; if the upper or lower limit of the hot water environment temperature is also exceeded, the ambient temperature abnormal protection is reported, and the mode remains unchanged; when hot water is produced, if the upper or lower limit of the hot water environment temperature is exceeded, the cooling mode is switched; if the upper or lower limit of the cooling environment temperature is also exceeded, the ambient temperature abnormal protection is reported, and the mode remains unchanged.

[0123] S2, heating + hot water mode, the specific operating steps are as follows:

[0124] S2.1, such as Figure 2 As shown, hot water production in the alternating mode takes priority;

[0125] S2.1.1, the heat pump shall be operated with priority to produce hot water;

[0126] S2.1.2, during the operation of hot water production, it is always determined whether the temperature reaches the shutdown state or the maximum temperature of the heat pump hot water production is reached;

[0127] S2.1.3, if the temperature is not reached and the heating start requirement is met;

[0128] S2.1.4, then start the rapid hot water operation, that is, the heat pump and the electric heating of the domestic water tank work at the same time, reducing the time required for heating hot water;

[0129] S2.1.5, then, keep looping to determine whether the temperature reaches the shutdown state or the maximum temperature of the heat pump water heating is reached. If it cannot be met, loop to perform the rapid water heating in step S2.1.4;

[0130] When the temperature of the domestic water tank reaches the set temperature point for hot water production or the maximum temperature of the hot water of the T1 heat pump, the heat pump will exit the hot water production operation. If it still does not reach the temperature set by the user at this time, the electric heating in the domestic water tank will continue to produce hot water until it reaches the temperature set by the user.

[0131] Until the water temperature reaches the set temperature or the maximum temperature of the heat pump;

[0132] S2.1.6, then, the compressor switches to heating mode operation;

[0133] S2.1.7. If the heating is required only after the temperature is reached in step S2.1.2, the heating mode is switched directly to operate;

[0134] S2.1.8, the heat pump switches from hot water production to heating mode;

[0135] During the heating operation, if there is a demand for the heat pump to start hot water, the compressor will be switched back to hot water operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; wherein the value range of A is 5-10min, preferably 6min; the value range of B is 3-5min, preferably 4min;

[0136] If the heating start requirement is not met, continue to maintain the hot water operation in the above steps;

[0137] S2.2, such as Figure 3 As shown, heating in alternating mode takes priority;

[0138] S2.2.1, if the system is in heating operation

[0139] S2.2.2, then it is determined whether the temperature reaching shutdown condition is met;

[0140] S2.2.3, if the temperature reaching shutdown condition is not met and there is a demand for hot water;

[0141] S2.2.4, it is necessary to determine whether the user's domestic water tank is equipped with an electric heating device;

[0142] S2.2.5. If an electric heating device is installed in the user's domestic water tank, the heat pump will maintain heating operation, and the hot water demand will be heated by the electric heating in the domestic water tank, and the heat pump will maintain heating operation;

[0143] S2.2.6. If the user's domestic water tank is not equipped with electric heating or other devices that can heat water, the heat pump will heat up and shut down for Bmin before switching to hot water operation; where B is in the range of 3-5min, preferably 4min;

[0144] S2.2.7, based on step S2.2.2, if the temperature reaches the highest level first, shut down;

[0145] S2.2.8, then determine whether there is a demand for hot water, if not, directly return to step S2.2.1;

[0146] S2.2.9. If there is a demand for hot water, it will be directly switched to hot water production;

[0147] S2.2.10. During the hot water production process, if there is a demand for heat pump heating, the heating operation will be switched back to operation after the compressor meets the minimum operating time Amin and stops for Bmin; the value range of A is 5-10min, preferably 6min; the value range of B is 3-5min, preferably 4min;

[0148] S2.3, advanced alternation;

[0149] When using advanced alternation, users can set the hot water operation duration t1 and the heating operation duration t3 according to their needs. During the hot water operation, when the heat pump meets the temperature-reaching shutdown condition of the hot water mode, or meets the hot water operation duration, the unit will shut down, and the heat pump will exit the hot water operation and switch to the heating mode; the value range of t1 is 20-60min, preferably 30min; the value range of t3 is 20-60min, preferably 30min;

[0150] S2.3.1. If the heating start condition is not met, the system will be in standby mode according to the heating mode;

[0151] If the hot water demand is met again during standby mode, the system will switch back to hot water operation.

[0152] Then, re-judge;

[0153] S2.3.2. If the heating start condition is met, the heating will be operated;

[0154] After the heating reaches the set temperature or reaches the heating operation time t3, and there is a demand for hot water, it switches to hot water mode;

[0155] If there is no demand for hot water, the heating mode is maintained in standby or operation.

[0156] And in the heating + hot water mode: when heating, if the upper or lower limit of the heating environment temperature is exceeded, the hot water mode is switched; if it also exceeds the upper or lower limit of the hot water environment temperature, the ambient temperature abnormality protection is reported, and the mode remains unchanged; when hot water is produced, if the upper or lower limit of the hot water ambient temperature is exceeded, the heating mode is switched; if it also exceeds the upper or lower limit of the heating ambient temperature, the ambient temperature abnormality protection is reported, and the mode remains unchanged.

[0157] In the above steps of this embodiment, the maximum temperature of the heat pump hot water is the maximum temperature at which the compressor can heat the hot water, and if the maximum temperature is exceeded, the water temperature of the single compressor cannot rise or rises very slowly; when other faults except the abnormal ambient temperature protection occur during the operation of the unit, the unit will not perform mode conversion and the standby state will remain unchanged.

[0158] In this embodiment, in order to solve the problem that most of the mode switching needs to be done manually during the switching of air-conditioning control modes, and it is impossible to realize the intelligent combination operation of multiple modes intelligently, a heat pump air-conditioning system can be used to realize heating + hot water making and cooling + hot water making at the same time, and automatically control the combination mode to switch automatically according to water temperature, user demand and unit assembly condition, and the internal switching logic of the combination mode is intelligently adjusted according to water temperature, user demand and the like in real time. Users can also choose advanced mode according to their needs to set the switching time they need, etc., to realize multiple switching modes for users to choose from, thereby meeting user customization needs to a greater extent.

[0159] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Except for the cases listed in the specific embodiments, all equivalent changes made according to the shape, structure and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A switching control method for a heat pump air conditioner system with a combination mode, wherein the heat pump air conditioner system comprises a heat pump air conditioner, a wire controller, a cooling / heating unit and a hot water unit, wherein the wire controller is connected to the heat pump air conditioner and is used to control the operation of the entire system, wherein the heat pump air conditioner is provided with a compressor, a fan for heat exchange and cooling, and a heat pump for heat exchange circulation, wherein the heat pump is respectively connected to the cooling / heating unit and the hot water unit through a three-way valve and a buffer water tank, wherein the cooling / heating unit is respectively provided with a floor heating component for heating or a fan coil component for cooling, wherein the hot water unit is provided with a domestic water tank for providing hot water, wherein the domestic water tank is also provided with an electric heater for providing auxiliary electric heating; wherein the The system is controlled by a wire controller to work in cooling + hot water mode or heating + hot water mode. After selecting the mode, the alternating mode or advanced alternating mode can be selected according to the needs. The priority of the mode can also be selected in the alternating mode. The switching control method specifically includes the following steps: S1, cooling + hot water mode, the specific operating steps are as follows: S1.1, hot water production in alternating mode has priority; S1.1.

1. Heat pumps are operated with priority to produce hot water; S1.1.2, during the operation of hot water production, it is always determined whether the temperature reaches the shutdown state or the maximum temperature of the heat pump hot water production is reached; S1.1.3, if the temperature is not reached and the cooling start requirement is met; S1.1.4, then start the rapid hot water operation, that is, the heat pump and the electric heating of the domestic water tank work at the same time, reducing the time required for heating hot water; S1.1.5, then, the process continues to loop to determine whether the temperature reaches the shutdown state or the maximum temperature of the heat pump water heating is reached. If it does not meet the requirements, the process of looping to perform the rapid water heating in step S1.1.4; When the temperature of the domestic water tank reaches the set temperature point for hot water production or the maximum temperature of the hot water of the T1 heat pump, the heat pump will exit the hot water production operation. If it still does not reach the temperature set by the user at this time, the electric heating in the domestic water tank will continue to produce hot water until it reaches the temperature set by the user. Until the water temperature reaches the set temperature or the maximum temperature of the heat pump; S1.1.6, then the compressor switches to cooling mode; S1.1.7, if there is a need to turn on cooling only after the temperature is reached in step S1.1.2, it will be directly switched to cooling mode; S1.1.8, the heat pump switches from hot water production to cooling mode; During the cooling operation, if there is a demand for the heat pump to start hot water, the compressor will switch back to hot water operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min; If the cooling start requirement is not met, continue to maintain the hot water operation in the above steps; S1.2, cooling priority in alternating mode; S1.2.1, if the system is in cooling operation S1.2.2, then it is determined whether the temperature reaching shutdown condition is met; S1.2.3, if the temperature reaching shutdown condition is not met and there is a demand for hot water; S1.2.4, it is necessary to determine whether the user's domestic water tank is equipped with an electric heating device; S1.2.

5. If an electric heating device is installed in the user's domestic water tank, the heat pump maintains cooling operation, and the hot water demand is heated by the electric heating in the domestic water tank, and the heat pump maintains cooling operation; S1.2.

6. If the user's domestic water tank is not equipped with electric heating or other devices that can heat water, the heat pump will operate in cooling mode and stop for Bmin before switching to hot water operation; where the value range of B is 3-5min; S1.2.

7. Based on step S1.2.3, if the temperature is reached first, stop; S1.2.8, then determine whether there is a demand for hot water, if not, directly return to step S1.2.1; S1.2.9, if there is a demand for hot water, it will be directly switched to hot water production; S1.2.10, during the hot water operation, if there is a demand to start the heat pump cooling, the compressor will switch back to cooling operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min; S1.3, advanced alternation; When using advanced alternation, users can set the hot water operation duration t1 and cooling operation duration t2 according to their needs. During the hot water operation, when the heat pump meets the hot water mode temperature shutdown condition, or meets the hot water operation duration, the unit will shut down and the heat pump will exit the hot water operation and switch to the cooling mode; the value range of t1 is 20-60min, and the value range of t2 is 20-60min; S1.3.

1. If the cooling start condition is not met, the cooling mode will be set to standby mode; If the hot water demand is met again during standby mode, the system will switch back to hot water operation. Then, re-judge; S1.3.

2. If the cooling start conditions are met, run the cooling; After the refrigeration reaches the set temperature or reaches the refrigeration operation time t2, and there is a demand for hot water, it switches to hot water mode; If there is no demand for hot water, the cooling mode is maintained in standby or operation; S2, heating + hot water mode, the specific operating steps are as follows: S2.1, hot water production in alternating mode has priority; S2.1.1, the heat pump shall be operated with priority to produce hot water; S2.1.2, during the operation of hot water production, it is always determined whether the temperature reaches the shutdown state or the maximum temperature of the heat pump hot water production is reached; S2.1.3, if the temperature is not reached and the heating start requirement is met; S2.1.4, then start the rapid hot water operation, that is, the heat pump and the electric heating of the domestic water tank work at the same time, reducing the time required for heating hot water; S2.1.5, then, keep looping to determine whether the temperature reaches the shutdown state or the maximum temperature of the heat pump water heating is reached. If it cannot be met, loop to perform the rapid water heating in step S2.1.4; When the temperature of the domestic water tank reaches the set temperature point for hot water production or the maximum temperature of the hot water of the T1 heat pump, the heat pump will exit the hot water production operation. If it still does not reach the temperature set by the user at this time, the electric heating in the domestic water tank will continue to produce hot water until it reaches the temperature set by the user. Until the water temperature reaches the set temperature or the maximum temperature of the heat pump; S2.1.6, then, the compressor switches to heating mode operation; S2.1.

7. If the heating is required only after the temperature is reached in step S2.1.2, the heating mode is switched directly to operate; S2.1.8, the heat pump switches from hot water production to heating mode; During the heating operation, if there is a demand for the heat pump to start hot water, the compressor will switch back to hot water operation after the minimum operating time Amin of the compressor is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min; If the heating start requirement is not met, continue to maintain the hot water operation in the above steps; S2.2, heating priority in alternating mode; S2.2.1, if the system is in heating operation S2.2.2, then it is determined whether the temperature reaching shutdown condition is met; S2.2.3, if the temperature reaching shutdown condition is not met and there is a demand for hot water; S2.2.4, it is necessary to determine whether the user's domestic water tank is equipped with an electric heating device; S2.2.

5. If an electric heating device is installed in the user's domestic water tank, the heat pump will maintain heating operation, and the hot water demand will be heated by the electric heating in the domestic water tank, and the heat pump will maintain heating operation; S2.2.

6. If the user's domestic water tank is not equipped with electric heating or other devices that can heat water, the heat pump will heat up and shut down for Bmin before switching to hot water operation; where the value range of B is 3-5min; S2.2.

7. Based on step S2.2.3, if the temperature is reached first, shut down; S2.2.8, then determine whether there is a demand for hot water, if not, directly return to step S2.2.1; S2.2.

9. If there is a demand for hot water, it will be directly switched to hot water production; S2.2.10, during the hot water operation, if there is a demand for heat pump heating, the heating operation will be switched back to operation after the compressor minimum operation time Amin is met and the compressor is shut down for Bmin; the value range of A is 5-10min, and the value range of B is 3-5min; S2.3, advanced alternation; When using advanced alternation, users can set the hot water operation duration t1 and heating operation duration t3 according to their needs. During the hot water operation, when the heat pump meets the temperature shutdown condition of the hot water mode, or meets the hot water operation duration, the unit will shut down and the heat pump will exit the hot water operation and switch to the heating mode; the value range of t1 is 20-60min, and the value range of t3 is 20-60min; S2.3.

1. If the heating start condition is not met, the system will be in standby mode according to the heating mode; If the hot water demand is met again during standby mode, the system will switch back to hot water operation. Then, re-judge; S2.3.

2. If the heating start condition is met, the heating will be operated; After the heating reaches the set temperature or reaches the heating operation time t3, and there is a demand for hot water, it switches to hot water mode; If there is no demand for hot water, the heating mode is maintained in standby or operation.

2. A switching control method for a heat pump air conditioner system with a combination mode according to claim 1, characterized in that: The maximum temperature of the heat pump hot water is the highest temperature at which the compressor can heat the hot water, and if the maximum temperature is exceeded, the water temperature cannot rise or rises very slowly when the compressor is running alone.

3. A switching control method for a heat pump air conditioner system with a combination mode according to claim 1, characterized in that: In the cooling + hot water mode: when cooling, the upper or lower limit of the cooling environment temperature is exceeded, the hot water mode is switched; If the upper or lower limit of the hot water environment temperature is exceeded at the same time, the ambient temperature abnormality protection will be reported and the mode will remain unchanged; When heating water, if the upper or lower limit of the hot water temperature is exceeded, the cooling mode will be switched. If the upper or lower limit of the cooling temperature is also exceeded, the abnormal temperature protection will be reported and the current mode will remain unchanged.

4. A switching control method for a heat pump air conditioner system with a combination mode according to claim 1, characterized in that: In the heating + hot water mode: when heating, when the upper or lower limit of the heating environment temperature is exceeded, the hot water mode is switched; If the upper or lower limit of the hot water environment temperature is exceeded at the same time, the ambient temperature abnormality protection will be reported and the mode will remain unchanged; When heating water, if the upper or lower limit of the hot water temperature is exceeded, the heating mode is switched. If the upper or lower limit of the heating temperature is also exceeded, the abnormal temperature protection is reported and the current mode remains unchanged.

5. A switching control method for a heat pump air conditioner system with a combination mode according to claim 1, characterized in that: When other faults except abnormal ambient temperature protection occur during the operation of the unit, the unit will not perform mode conversion and the standby mode will remain unchanged.

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