Air conditioner and hot water all-in-one machine, control method thereof and computer program product

Abstract

The invention relates to an air conditioner and hot water all-in-one machine, a control method of the air conditioner and hot water all-in-one machine and a computer program product. The control method comprises the steps that the air conditioner and hot water all-in-one machine starts a single hot water mode; the outdoor environment temperature and the water temperature in a water tank are obtained, and the operation frequency of a compressor is controlled according to the outdoor environment temperature and the water temperature; and / or, within the preset starting time, the operation frequency of the compressor is obtained, and the opening degree of the electronic expansion valve of the water tank is controlled according to the operation frequency; and / or, after the compressor is started for preset time, the actual exhaust temperature and the target exhaust temperature of the compressor are obtained, and the opening degree of the electronic expansion valve of the water tank is controlled according to the actual exhaust temperature and the target exhaust temperature. When the single hot water mode is operated, the operation frequency of the compressor and / or the electronic expansion valve of the water tank can be effectively controlled, so that the purpose of improving the use experience of a user is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment, and particularly to an air conditioner with hot water integrated machine, a control method thereof, and a computer program product. Background Art

[0002] At present, the air conditioner with hot water integrated machine includes an indoor unit, an outdoor unit, and a hot water module. The indoor unit is one or more, and the indoor unit includes an indoor heat exchanger and an indoor electronic expansion valve. The outdoor unit includes a compressor and an outdoor heat exchanger. The hot water module includes a water tank and a water tank heat exchanger, and the water tank heat exchanger is located inside the water tank.

[0003] When the air conditioner with hot water integrated machine operates in the single hot water mode, the working process is as follows: After the high-temperature and high-pressure refrigerant is discharged from the compressor, it flows through the water tank solenoid valve into the water tank heat exchanger inside the water tank, releases heat to the water tank, and after throttling through the water tank electronic expansion valve, it becomes a low-temperature and low-pressure refrigerant, and flows into the air conditioner outdoor unit heat exchanger. After the refrigerant evaporates and absorbs heat therein, it enters the compressor suction end to complete the entire cycle.

[0004] Since there is no coil temperature sensor and inlet and outlet temperature sensors in the water tank heat exchanger. Therefore, when operating in the single hot water mode, the following problems exist: First is the control problem of the air conditioner operating frequency. Traditional air conditioners use the difference between the coil temperature of the heat exchanger and the target temperature to control the target frequency of the compressor. However, there is no coil temperature in the current water tank heat exchanger, so an alternative control method needs to be found. Second is the control problem of the opening of the water tank electronic expansion valve. Traditional air conditioners use the coil temperature of the indoor heat exchanger and the superheat value at the outlet to control the target opening of the indoor electronic expansion valve. However, there is no coil temperature and outlet temperature in the current water tank heat exchanger, so an alternative control method is also needed.

[0005] That is to say, there is an urgent need for a control method for an air conditioner with hot water integrated machine operating in the single hot water mode to effectively control the operating frequency of the compressor and / or the water tank electronic expansion valve, so as to have a better hot water production effect. Summary of the Invention

[0006] In view of the above problems, the present invention is proposed to provide an air conditioner with hot water integrated machine, a control method thereof, and a computer program product that can overcome or at least partially solve the above problems, and can effectively control the operating frequency of the compressor and / or the water tank electronic expansion valve when operating in the single hot water mode, so as to achieve the purpose of improving the user experience.

[0007] Specifically, the present invention provides the following technical solutions:

[0008] A control method for an air conditioner with hot water integrated machine, comprising:

[0009] The air conditioner with hot water integrated unit starts the single hot water mode;

[0010] Obtain the outdoor ambient temperature and the water temperature in the water tank, and control the operating frequency of the compressor according to the outdoor ambient temperature and the water temperature; and / or

[0011] Within a preset startup time, obtain the operating frequency of the compressor, and control the opening degree of the water tank electronic expansion valve according to the operating frequency; and / or

[0012] After the preset startup time, obtain the actual exhaust temperature and the target exhaust temperature of the compressor, and control the opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature.

[0013] Optionally, the controlling the opening degree of the water tank electronic expansion valve according to the operating frequency includes:

[0014] Obtain the first opening degree of the water tank electronic expansion valve according to the operating frequency;

[0015] Control the water tank electronic expansion valve to execute the first opening degree.

[0016] Optionally, the controlling the opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature includes:

[0017] Obtain the second opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature;

[0018] Control the water tank electronic expansion valve to execute the second opening degree.

[0019] Optionally, a mapping relation table of the outdoor ambient temperature - water temperature - optimal frequency value of the compressor is pre - stored in the air conditioner with hot water integrated unit;

[0020] The controlling the operating frequency of the compressor according to the outdoor ambient temperature and the water temperature includes:

[0021] Determine the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature according to the mapping relation table;

[0022] Control the compressor to execute the corresponding optimal frequency value.

[0023] Optionally, the obtaining the first opening degree of the water tank electronic expansion valve according to the operating frequency includes:

[0024] Calculate the first opening degree according to the following formula:

[0025] YS = ap * Hz + bp

[0026] Where, Hz is the operating frequency of the compressor;

[0027] ap is a set coefficient;

[0028] bp is a set value;

[0029] YS is the first opening degree of the electronic expansion valve of the water tank.

[0030] Optionally, obtaining the second opening degree of the electronic expansion valve of the water tank according to the actual exhaust gas temperature and the target exhaust gas temperature includes:

[0031] Obtaining a valve opening degree compensation value of the electronic expansion valve of the water tank according to the difference between the target exhaust gas temperature and the actual exhaust gas temperature;

[0032] Obtaining the second opening degree according to the valve opening degree compensation value and the first opening degree.

[0033] Optionally, obtaining the target exhaust gas temperature of the compressor includes:

[0034] Calculating the target exhaust gas temperature according to the following formula:

[0035] DisT = a * Hz + b + c

[0036] where DisT is the target exhaust gas temperature;

[0037] Hz is the operating frequency of the compressor;

[0038] a is a preset coefficient;

[0039] b is a first preset value;

[0040] c is a second preset value.

[0041] Optionally, the second preset value takes numbers in segments according to the water temperature in the water tank.

[0042] Optionally, obtaining the second opening degree of the electronic expansion valve of the water tank according to the actual exhaust gas temperature and the target exhaust gas temperature includes:

[0043] Calculating the second opening degree according to the following formula:

[0044] YT = f(Dis, DisT)

[0045] where YT is the second opening degree;

[0046] Dis is the actual exhaust gas temperature;

[0047] DisT is the target exhaust gas temperature.

[0048] Optionally, the control method further includes:

[0049] Execute the step of obtaining the outdoor ambient temperature and the water temperature in the water tank once every preset time period.

[0050] Optionally, obtaining the water temperature in the water tank includes:

[0051] Obtain the middle water temperature and the outlet water temperature in the water tank;

[0052] Take the average value of the middle water temperature and the outlet water temperature as the water temperature in the water tank.

[0053] On the other hand, the present invention also provides an air conditioner and water heater integrated machine. The air conditioner and water heater integrated machine further includes a controller, the controller includes a memory, a processor, and a computer program stored on the memory and running on the processor, and when the processor executes the computer program, the steps of the control method of the above-mentioned air conditioner and water heater integrated machine are implemented.

[0054] On yet another aspect, the present invention also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the control method of the above-mentioned air conditioner and water heater integrated machine are implemented.

[0055] In an air conditioner and water heater integrated machine, a control method of the air conditioner and water heater integrated machine, and a computer program product of the present invention, a single hot water control method of the air conditioner and water heater integrated machine is specifically provided. When the air conditioner and water heater integrated machine operates in the single hot water mode, the operating frequency of the compressor is controlled according to the outdoor ambient temperature and the water temperature in the water tank; and / or, in the initial stage of starting up, the opening degree of the water tank electronic expansion valve is controlled according to the operating frequency of the compressor; and / or, in the stable operation stage, the opening degree of the water tank electronic expansion valve is controlled according to the actual exhaust temperature and the target exhaust temperature. Compared with the prior art, the present invention can reasonably, scientifically and accurately adjust the compressor frequency and / or the opening degree of the water tank electronic expansion valve, so that the air conditioner and water heater integrated machine has a better hot water production effect.

[0056] In addition, the control method of the present invention has the beneficial effect that the control program is simple and easy to execute.

[0057] Therefore, according to the following detailed description of specific embodiments of the present invention in conjunction with the drawings, those skilled in the art will more clearly understand the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but non-limiting manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0059] Figure 1It is a schematic flowchart of a control method for an air conditioner and hot water integrated machine according to an embodiment of the present invention;

[0060] Figure 2 It is a schematic flowchart of a control method according to an embodiment of the present invention;

[0061] Figure 3 It is a schematic flowchart of a control method according to an embodiment of the present invention;

[0062] Figure 4 It is a schematic flowchart of a control method according to an embodiment of the present invention;

[0063] Figure 5 It is a schematic flowchart of a control method according to an embodiment of the present invention;

[0064] Figure 6 It is a schematic flowchart of a control method according to an embodiment of the present invention;

[0065] Figure 7 It is a schematic working principle diagram of an air conditioner and hot water integrated machine according to an embodiment of the present invention;

[0066] Figure 8 It is a schematic block diagram of an air conditioner and hot water integrated machine according to an embodiment of the present invention;

[0067] Figure 9 It is a schematic block diagram of a computer program product according to an embodiment of the present invention. Detailed implementation manners

[0068] Next, refer to Figures 1 to 9 to describe an air conditioner and hot water integrated machine, a control method for the air conditioner and hot water integrated machine, and a computer program product according to an embodiment of the present invention. Among them, the orientation or positional relationship indicated by "front", "rear", "upper", "lower", "top", "bottom", "inner", "outer", "lateral", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0069] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature, that is, one or more such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. When a feature "comprises or includes" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0070] Unless otherwise clearly specified and defined, terms such as "arranged", "installed", "connected", "joined", "fixed", "coupled", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0071] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through additional features therebetween. That is, in the description of this embodiment, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "below", or "beneath" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this embodiment, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0073] Figure 1 is a schematic flowchart of a control method of an air conditioner and hot water integrated machine 100 according to an embodiment of the present invention, and in combination with Figures 2 - 7, an embodiment of the present invention provides a control method for an air-conditioning and hot water integrated machine 100.

[0074] As Figure 1 shown, a control method for an air-conditioning and hot water integrated machine may include the following steps:

[0075] S100, the air-conditioning and hot water integrated machine starts the single hot water mode;

[0076] S200, obtain the outdoor ambient temperature and the water temperature in the water tank, and control the operating frequency of the compressor according to the outdoor ambient temperature and the water temperature;

[0077] S300, within the preset startup time, obtain the operating frequency of the compressor, and control the opening degree of the water tank electronic expansion valve according to the operating frequency;

[0078] S400, after the preset startup time, obtain the actual exhaust temperature and the target exhaust temperature of the compressor, and control the opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature.

[0079] Specifically, the preset time can be set as needed. For example, the preset time can be 6 min.

[0080] In this embodiment, since the water tank heat exchanger is located in the water tank, the water temperature has an important influence on the water tank heat exchanger. Therefore, in this embodiment, the operating frequency of the compressor is controlled according to the water temperature in the water tank. In addition, since the key to heating the water tank lies in maintaining the temperature difference between the water tank heat exchanger temperature and the water temperature in the water tank, the higher the temperature difference, the higher the heating rate. According to the system diagram, the compressor exhaust will be directly injected into the water tank heat exchanger. Therefore, the water tank heat exchanger temperature is directly determined by the exhaust temperature. Under the condition that the compressor frequency is determined by the water temperature in the water tank, in order to ensure the heat exchange temperature difference, the valve opening degree can be judged to increase or decrease through the exhaust temperature, so as to further correct the exhaust temperature, so as to ensure that the exhaust temperature can meet the demand for heating water. Therefore, after the preset startup time, the opening degree of the water tank electronic expansion valve is controlled according to the target exhaust temperature and the actual exhaust temperature. In addition, within the preset startup time, since the temperature difference between the water tank heat exchanger temperature and the water temperature in the water tank is large, therefore, at this time, the opening degree of the water tank electronic expansion valve is controlled according to the actual operating frequency of the compressor.

[0081] This embodiment provides a single hot water control method for an air conditioner with a hot water integrated unit. When the air conditioner with a hot water integrated unit operates in the single hot water mode, the operating frequency of the compressor is controlled according to the outdoor ambient temperature and the water temperature in the water tank; in the initial stage of startup, the opening degree of the water tank electronic expansion valve is controlled according to the operating frequency of the compressor; in the stable operation stage, the opening degree of the water tank electronic expansion valve is controlled according to the actual exhaust temperature and the target exhaust temperature. Compared with the prior art, the present invention can reasonably, scientifically and accurately adjust the compressor frequency and the opening degree of the water tank electronic expansion valve, so that the air conditioner with a hot water integrated unit has a better hot water production effect.

[0082] In some alternative embodiments of the present invention, a control method for an air conditioner with a hot water integrated unit may include step S100, and may further include any one or two of steps S200, S300 and S400.

[0083] As Figure 2 shown, in some optional embodiments of the present invention, in step S300, the controlling the opening degree of the water tank electronic expansion valve according to the operating frequency specifically includes the following steps:

[0084] S301, obtaining a first opening degree of the water tank electronic expansion valve according to the operating frequency;

[0085] S302, controlling the water tank electronic expansion valve to execute the first opening degree.

[0086] Within the preset startup time, the temperature difference between the water tank heat exchanger temperature and the water temperature in the water tank is large, that is, the exhaust temperature is much higher than the water temperature in the water tank; and the compressor is in the frequency increasing stage, the frequency of the compressor changes greatly, the system pressure gradually increases, and the refrigerant flow rate also gradually increases. At this time, the refrigerant flow rate is the key factor affecting the heating effect of the water tank heat exchanger. Therefore, when the compressor just starts to run, controlling the water tank electronic expansion valve to execute the corresponding first opening degree according to the actual operating frequency of the compressor can not only timely adjust the refrigerant flow rate flowing through the water tank heat exchanger, so that the water tank heat exchanger has good heat exchange capacity, but also can well balance the system pressure.

[0087] As Figure 3 shown, in some optional embodiments of the present invention, in step S400, the controlling the opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature specifically includes the following steps:

[0088] S401, obtaining a second opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature;

[0089] S402, controlling the water tank electronic expansion valve to execute the second opening degree.

[0090] After the preset startup time, the water tank heating stage officially begins. The compressor is in a relatively stable stage, and the change in the compressor frequency is relatively small. The water temperature in the water tank is relatively high. At this time, the exhaust temperature is the key factor affecting the heat exchange capacity of the water tank heat exchanger. At this time, it is necessary to maintain a sufficiently high exhaust temperature to maintain the temperature of the refrigerant in the water tank heat exchanger, thereby ensuring the heating effect of the water tank. Therefore, in this embodiment, after the preset startup time, according to the actual exhaust temperature and the target exhaust temperature, the water tank electronic expansion valve is controlled to execute a corresponding second opening degree to adjust the actual exhaust temperature so that the actual exhaust temperature is equal to or close to the target exhaust temperature, so as to maintain a certain difference between the indoor heat exchanger temperature and the water temperature, and further enable the water tank heat exchanger to have good heat exchange capacity to meet the heating effect of the water tank.

[0091] In some alternative embodiments of the present invention, a mapping relationship table of outdoor ambient temperature - water temperature - the optimal frequency value of the compressor is pre-stored in the air-conditioning and hot water integrated machine. The mapping relationship table can be as shown in Table 1.

[0092] As Figure 4 shown, in step S200, the controlling the operating frequency of the compressor according to the outdoor ambient temperature and the water temperature specifically includes the following steps:

[0093] S201, according to the mapping relationship table of outdoor ambient temperature - water temperature - the optimal frequency value of the compressor, determine the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature;

[0094] S202, control the compressor to execute the corresponding optimal frequency value. That is to say, take the optimal frequency value as the operating frequency of the compressor.

[0095] Table 1 Mapping relationship table of outdoor ambient temperature - water temperature - the optimal frequency value of the compressor

[0096]

[0097] Further, step S201 includes: determining the interval of the outdoor ambient temperature in which the current outdoor ambient temperature is located in the mapping relationship table, and determining the interval of the water temperature in which the current water temperature is located in the mapping relationship table; then find out the corresponding optimal frequency value of the compressor in the mapping relationship table.

[0098] Adopting this embodiment can quickly and accurately obtain the optimal frequency value of the compressor corresponding to different outdoor ambient temperatures and different water temperatures, which is beneficial to more precisely control the opening degree of the electronic expansion valve, and further beneficial to further improving the hot water production effect of the air-conditioning and hot water integrated machine.

[0099] In other alternative embodiments of the present invention, the optimal frequency value of the compressor corresponding to different outdoor ambient temperatures and different water temperatures can also be obtained according to the outdoor ambient temperature and the water temperature, in combination with the corresponding algorithm.

[0100] In some alternative embodiments of the present invention, in step S301, the controlling the electronic expansion valve of the water tank to execute the first opening degree according to the operating frequency may include the following steps:

[0101] Calculate the first opening degree according to the following formula:

[0102] YS = ap * Hz + bp

[0103] Wherein, Hz is the operating frequency of the compressor; ap is a set coefficient; bp is a set value; YS is the first opening degree of the electronic expansion valve of the water tank.

[0104] Furthermore, Hz is the actual operating frequency of the compressor, and its unit is Hertz. The unit of YS is plus. ap and bp are values obtained according to the measured data. The first opening degree can also be referred to as the initial valve opening degree.

[0105] By using the calculation formula of this embodiment, the first opening degree can be obtained quickly and accurately, thereby improving the control accuracy of the water temperature and being beneficial to further improving the hot water production effect of the air-conditioning and hot water integrated machine.

[0106] As Figure 5 shown, in some alternative embodiments of the present invention, in S401, the obtaining the second opening degree of the electronic expansion valve of the water tank according to the actual exhaust temperature and the target exhaust temperature may include the following steps:

[0107] S4011, obtain the valve opening degree compensation value of the electronic expansion valve of the water tank according to the difference between the target exhaust temperature and the actual exhaust temperature;

[0108] S4012, obtain the second opening degree according to the valve opening degree compensation value and the first opening degree.

[0109] In this embodiment, the valve opening degree is compensated according to the difference between the target exhaust temperature and the actual exhaust temperature, and the valve opening degree can be adjusted in time according to the actual heat exchange demand, thereby improving the control accuracy of the water temperature.

[0110] In some alternative embodiments of the present invention, the obtaining the target exhaust temperature of the compressor includes:

[0111] Calculate the target exhaust temperature according to the following formula:

[0112] DisT = a * Hz + b + c

[0113] Among them, DisT is the target exhaust temperature, and its unit is °C; Hz is the operating frequency of the compressor, and its unit is Hertz; a is a preset coefficient; b is a first preset value; c is a second preset value.

[0114] Furthermore, Hz is the actual operating frequency of the compressor. a and b are values obtained based on measured data, and a and b are fixed values. Further still, the second preset value is obtained by segmenting according to the water temperature in the water tank, and the specific values of c are shown in Table 2 below. That is to say, determine the preset water temperature range in which the current water temperature is located, and use the c value corresponding to the preset water temperature range as the second preset value.

[0115] Table 2

[0116] Water temperature ～t1 t1 to t2 t2 to t3 t3 to t4 … c c1 c2 c3 c4 …

[0117] This embodiment provides a specific algorithm for calculating the target exhaust temperature. In the above algorithm, the second preset value is obtained according to the water temperature in the water tank, which can improve the calculation accuracy of the target exhaust temperature. Therefore, the target exhaust temperature can be calculated quickly and accurately using the above formula.

[0118] In some alternative embodiments of the present invention, S401, obtaining the second opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature, includes:

[0119] Calculating the second opening degree according to the following formula:

[0120] YT = f(Dis, DisT)

[0121] Among them, YT is the second opening degree, Dis is the actual exhaust temperature, and DisT is the target exhaust temperature. This formula indicates that the second valve opening degree is a function of the actual exhaust temperature and the target exhaust temperature. This function is first analyzed and run through the PID control method, and then the actual parameters are measured. The precise control logic can be obtained by correcting the measured actual parameters. This embodiment provides a specific algorithm for calculating the second opening degree according to the actual exhaust temperature and the target exhaust temperature. Using the above algorithm, the second opening degree can be calculated quickly and accurately, so as to achieve precise control of the water tank electronic expansion valve during the stable operation stage.

[0122] In some alternative embodiments of the present invention, the control method further includes: executing the step of obtaining the outdoor ambient temperature and the water temperature in the water tank every preset time period.

[0123] By using the above method, the operating frequency of the compressor and the valve opening degree of the electronic expansion valve can be adaptively adjusted according to the changes in the outdoor ambient temperature and the water temperature in the water tank, so as to be able to control the heating effect of the water tank heat exchanger more precisely.

[0124] Such asFigure 6 As shown, in some alternative embodiments of the present invention, the specific steps of "obtaining the water temperature in the water tank" include the following:

[0125] S501, obtain the middle water temperature and the outlet water temperature in the water tank;

[0126] S502, take the average value of the middle water temperature and the outlet water temperature as the water temperature in the water tank.

[0127] Specifically, a first temperature sensor is provided in the middle of the water tank for obtaining the middle temperature in the water tank; a second temperature sensor is provided at the water outlet of the water tank for obtaining the outlet temperature in the water tank. Since there may be an error between the middle water temperature and the outlet water temperature. In this embodiment, taking the average value of the middle water temperature and the outlet water temperature as the water temperature in the water tank can reduce misjudgment to further improve the control accuracy.

[0128] As Figure 7 shown, in some alternative embodiments of the present invention, the air-conditioning and hot water integrated machine includes a plurality of indoor units arranged in parallel. The air-conditioning and hot water integrated machine is a multi-connected air-conditioning and hot water integrated machine, and the plurality of indoor units are distributed in a plurality of indoor spaces for heat exchange in the plurality of indoor spaces.

[0129] For example, the air-conditioning and hot water integrated machine includes a compressor 121, a four-way valve 122, an outdoor heat exchanger 123, three indoor units, and a hot water module 127.

[0130] The three indoor units are indoor unit A, indoor unit B, and indoor unit C respectively. Each indoor unit includes an indoor electronic expansion valve and an indoor unit, and each indoor unit includes an indoor heat exchanger. Among them, indoor unit A includes the first indoor electronic expansion valve 135A and indoor unit A124, and indoor unit A124 includes the first indoor heat exchanger 1241. Indoor unit B includes the second indoor electronic expansion valve 135B and indoor unit B (not shown in the figure), and indoor unit B includes the second indoor heat exchanger. Indoor unit C includes the third indoor electronic expansion valve 135C and indoor unit C (not shown in the figure), and indoor unit C includes the third indoor heat exchanger. The hot water module 127 includes a water tank and a water tank heat exchanger, and the water tank heat exchanger is located inside the water tank. The exhaust port of the compressor 121 is connected to the first exhaust branch and the second exhaust branch. The first exhaust branch is connected to the water tank heat exchanger, and the second exhaust branch is connected to the high-temperature intake port of the four-way valve 122. A first solenoid valve 132 and a first stop valve 133 are provided on the first exhaust branch. The first solenoid valve 132 is used to adjust the refrigerant flow rate of the water tank heat exchanger, and the first stop valve 133 is used to control the on / off of the first exhaust branch. A water tank electronic expansion valve 137 is provided on the outlet side of the water tank heat exchanger to throttle the refrigerant flowing out of the water tank heat exchanger. An outdoor refrigerant regulating device is provided between the outdoor heat exchanger 123 and the four-way valve 122, and the outdoor refrigerant regulating device is an outdoor electronic expansion valve 131 to adjust the amount of refrigerant flowing through the outdoor heat exchanger 123. The outdoor heat exchanger 123 and the water tank electronic expansion valve 137 are connected to the indoor units through a liquid refrigerant header 151, and the liquid refrigerant header 151 is connected with three liquid pipe connection branches: the first liquid pipe connection branch, which is configured to be connectable to indoor unit A; the second liquid pipe connection branch, which is configured to be connectable to indoor unit B; the third liquid pipe connection branch, which is configured to be connectable to indoor unit C. A third stop valve 134 is provided between the outdoor heat exchanger 123 and the liquid refrigerant header 151.

[0131] The indoor heat exchanger connection port of the four-way valve 122 is connected to the gaseous refrigerant header 152 through a refrigerant pipe, and a second stop valve 136 and a second solenoid valve 138 are provided on the refrigerant pipe. The gaseous refrigerant header 152 is provided with three gas pipe connection branches: the first gas pipe connection branch, which is configured to be connectable to indoor unit A; the second gas pipe connection branch, which is configured to be connectable to indoor unit B; the third gas pipe connection branch, which is configured to be connectable to indoor unit C.

[0132] When the air conditioner and hot water integrated machine operates in the single hot water mode, the first solenoid valve 132, the first stop valve 133, the third stop valve 134, the outdoor electronic expansion valve 131, and the water tank electronic expansion valve 137 are opened; the second stop valve 136, the second solenoid valve 138, the first indoor electronic expansion valve 135A, the second indoor electronic expansion valve 135B, and the third indoor electronic expansion valve 135C are closed.

[0133] When the air-conditioning and water-heating integrated machine operates in the single hot water mode, the working principle of the air-conditioning and water-heating integrated machine is as follows: the high-temperature and high-pressure refrigerant discharged from the compressor enters the water tank heat exchanger, and then passes through the water tank electronic expansion valve 137, the outdoor heat exchanger 123, the outdoor electronic expansion valve 131 and the four-way valve 122 in sequence, and finally passes through the air inlet of the compressor and returns to the compressor 121 again.

[0134] The air conditioning and water heating machine also includes an outdoor temperature sensor 140 for obtaining the outdoor ambient temperature.

[0135] In some optional embodiments of the present invention, the air-conditioning and water-heating integrated machine includes an indoor unit. In this embodiment, the air-conditioning and water-heating integrated machine has the advantages of being easy to manufacture and having low production cost.

[0136] In some preferred embodiments of the present invention, a control method for an air-conditioning and water-heating integrated machine may include the following steps:

[0137] S1, control the air conditioning and hot water integrated machine to start the hot water only mode;

[0138] S2, obtaining the outdoor ambient temperature and the water temperature in the water tank once every preset time period;

[0139] S3, determining the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature according to the mapping relationship table of outdoor ambient temperature-water temperature-optimal frequency value of the compressor;

[0140] S4, controlling the compressor to execute the corresponding optimal frequency value;

[0141] S5, obtaining the operating frequency of the compressor within the preset startup time;

[0142] S6, controlling the opening of the electronic expansion valve of the water tank according to the operating frequency;

[0143] S7, after the preset startup time, obtaining the actual exhaust temperature and the target exhaust temperature of the compressor;

[0144] S8, controlling the opening of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature.

[0145] This embodiment provides a single hot water control method for an air conditioner and hot water integrated machine. When the air conditioner and hot water integrated machine operates in the single hot water mode, the outdoor ambient temperature and water temperature are obtained in real time, and the optimal frequency value of the compressor is obtained according to the mapping relation table of outdoor ambient temperature - water temperature - optimal frequency value of the compressor, and the compressor is controlled to execute the above optimal frequency value. In the initial stage of startup, the opening of the water tank electronic expansion valve is controlled according to the operating frequency of the compressor; in the stable operation stage, the opening of the water tank electronic expansion valve is controlled according to the actual exhaust temperature and the target exhaust temperature. Compared with the prior art, this embodiment can perform reasonable, scientific and precise adaptive adjustment on the compressor frequency and the opening of the water tank electronic expansion valve, so that the air conditioner and hot water integrated machine has a better hot water production effect.

[0146] As Figure 8 shown, an embodiment of the present invention further provides an air conditioner and hot water integrated machine 100. The air conditioner and hot water integrated machine 100 further includes a controller 110. The controller 110 includes a memory 111, a processor 112, and a computer program 210 stored on the memory 111 and running on the processor 112. When the processor 112 executes the computer program 210, the steps of the control method of the air conditioner and hot water integrated machine 100 in any of the above embodiments or combinations of embodiments are implemented.

[0147] The controller 110 can be directly set inside the air conditioner and hot water integrated machine 100, and is wired-connected to the electrical components related to the air conditioner and hot water integrated machine 100, and the steps of the control method of the air conditioner and hot water integrated machine 100 are implemented. The controller can also be set on a cloud server, and is wired or wirelessly connected to the electrical components related to the air conditioner and hot water integrated machine 100, and the steps of the control method of the air conditioner and hot water integrated machine 100 are implemented.

[0148] In some embodiments of the computer program product of the present invention, as Figure 9 shown, the computer program product 200 includes a computer program 210. When the computer program 210 is executed by the processor 112, the steps of the control method of the air conditioner and hot water integrated machine 100 in any of the above are implemented.

[0149] The computer program 210 for performing the operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, configuration data of an integrated circuit, or source code or object code written in any combination of one or more programming languages and procedural programming languages. The computer program 210 may be executed entirely on the user's computer, partially on the user's computer, executed as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, to perform aspects of the present invention, an electronic circuit, including, for example, a programmable logic circuit, a field-programmable gate array (FPGA), or a programmable logic array (PLA), may execute computer-readable program instructions by utilizing the state information of the computer-readable program instructions to personalize the electronic circuit.

[0150] For the description of this embodiment, the computer program product 200 is a related product containing the computer program 210.

[0151] The computer program 210 may be stored in a computer-readable storage medium.

[0152] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as a definite sequence list of executable instructions for implementing logical functions, and may be specifically implemented in any computer-readable storage medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in conjunction with these instruction execution systems, apparatus, or devices.

[0153] For the description of this embodiment, a computer-readable storage medium can be any device that can contain, store, communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable storage medium include the following: an electrical connection portion (electronic device) having one or more wirings, a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable storage medium can even be paper or other suitable medium on which the program can be printed, as the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpretation, or otherwise processing it in a suitable manner if necessary, and then storing it in a computer memory.

[0154] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be executed in any specific order, or that all operations of the method are included in every case. Additionally, the method can include additional operations. Within the scope of the technical concept provided by the method of this embodiment, additional changes can be made to the above method.

[0155] There are multiple exemplary embodiments of the present invention. However, without departing from the spirit and scope of the present invention, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A control method for an integrated air conditioner and water heater, characterized in that, Including: The air conditioner with hot water integrated unit starts the single hot water mode; Obtain the outdoor ambient temperature and the water temperature in the water tank, and control the operating frequency of the compressor according to the outdoor ambient temperature and the water temperature; and / or Within a preset startup time, obtain the operating frequency of the compressor, and control the opening degree of the water tank electronic expansion valve according to the operating frequency; and / or After the preset startup time, obtain the actual exhaust temperature and the target exhaust temperature of the compressor, and control the opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature.

2. The control method according to claim 1, wherein Controlling the opening degree of the water tank electronic expansion valve according to the operating frequency includes: Obtain the first opening degree of the water tank electronic expansion valve according to the operating frequency; Control the water tank electronic expansion valve to execute the first opening degree.

3. The control method according to claim 1, wherein Controlling the opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature includes: Obtain the second opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature; Control the water tank electronic expansion valve to execute the second opening degree.

4. The control method according to claim 1, wherein A mapping relation table of outdoor ambient temperature - water temperature - optimal frequency value of the compressor is pre-stored in the air conditioner with hot water integrated unit; Controlling the operating frequency of the compressor according to the outdoor ambient temperature and the water temperature includes: Determine the optimal frequency value of the compressor corresponding to the current outdoor ambient temperature and the current water temperature according to the mapping relation table; Control the compressor to execute the corresponding optimal frequency value.

5. The control method according to claim 2, wherein Obtaining the first opening degree of the water tank electronic expansion valve according to the operating frequency includes: Calculate the first opening degree according to the following formula: YS = ap * Hz + bp wherein, Hz is the operating frequency of the compressor; ap is a set coefficient; bp is a set value; YS is the first opening degree of the water tank electronic expansion valve.

6. The control method according to claim 3, wherein Obtaining the second opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature includes: Obtain the valve opening degree compensation value of the water tank electronic expansion valve according to the difference between the target exhaust temperature and the actual exhaust temperature; Obtain the second opening degree according to the valve opening degree compensation value and the first opening degree.

7. The control method according to claim 1, wherein Obtaining the target exhaust temperature of the compressor includes: Calculate the target exhaust temperature according to the following formula: DisT = a * Hz + b + c wherein, DisT is the target exhaust temperature; Hz is the operating frequency of the compressor; a is a preset coefficient; b is a first preset value; c is a second preset value.

8. The control method according to claim 3, wherein Obtaining the second opening degree of the water tank electronic expansion valve according to the actual exhaust temperature and the target exhaust temperature includes: Calculate the second opening degree according to the following formula: YT = f(Dis, DisT) Wherein, YT is the second opening degree; Dis is the actual exhaust temperature; DisT is the target exhaust temperature.

9. The control method according to claim 1, characterized in that, It further includes: Performing the step of obtaining the outdoor ambient temperature and the water temperature in the water tank once every preset time period.

10. The control method according to claim 1, characterized in that Obtaining the water temperature in the water tank includes: Obtaining the middle water temperature and the outlet water temperature in the water tank; Taking the average value of the middle water temperature and the outlet water temperature as the water temperature in the water tank.

11. An air conditioner and hot water integrated machine, characterized in that, It includes a controller, the controller includes a memory, a processor, and a computer program stored on the memory and running on the processor, and when the processor executes the computer program, it realizes the steps of the control method of the air-conditioning and hot water integrated machine as described in any one of claims 1 to 10.

12. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it realizes the steps of the control method of the air-conditioning and hot water integrated machine as described in any one of claims 1 to 10.

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