Fluorine hot water heat pump multi-split unit and intelligent temperature control method thereof

Abstract

The invention discloses a fluorine hot water heat pump multi-split unit and an intelligent temperature control method thereof, the maximum energy demand value of the unit is determined according to the number of outdoor units, and then the upper limit of the output energy demand of the unit is corrected according to the outdoor environment temperature, the air conditioner indoor unit environment temperature, the air conditioner indoor unit function demand and the human body average temperature; and determining the output frequency of the unit compressor according to the corrected upper limit of the output energy demand of the unit. According to the arrangement, the output frequency of the outdoor unit of the unit is controlled through the three factors of the room environment temperature, the human body environment temperature and the set temperature, then the room comfort can be better, the better temperature control effect can be achieved, and the energy consumption of the unit can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the field of temperature control of multi-split heat pump systems, and in particular to a multi-split fluorine hot water heat pump unit and an intelligent temperature control method thereof. Background Art

[0002] As people's requirements for comfort increase, air conditioners have become essential household appliances, and smarter and more functional air conditioning combination systems are becoming increasingly popular in the market.

[0003] A kind of Tianfu hot water heat pump multi-split system on the market can not only meet the needs of cooling in summer and heating in winter, but also meet the needs of heating hot water. However, when the air conditioner is cooling and heating, hot water must also be heated, and the exhaust temperature of the outdoor unit is diverted. This may lead to poor room comfort and difficulty in heating hot water. Therefore, the water tank will be equipped with an auxiliary electric heater, but if the electric heating of the water tank is always on, the power consumption is large. Therefore, in many cases, the electric heating is turned on according to the water temperature, but how to turn on the electric heating is the best way, which is a bottleneck problem; the second is the room comfort, how to control the output of the compressor, many of them are based on the set temperature of the wire controller and the current ambient temperature to control the output frequency of the compressor, and do not take into account the temperature factor of the human body, and there will be certain comfort limitations. Summary of the invention

[0004] In order to solve the problem of limitation of compressor output frequency in the prior art, the object of the present invention is to provide a fluorine hot water heat pump multi-split unit and an intelligent temperature control method thereof.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an intelligent temperature control method, which determines the maximum energy demand value of the unit according to the matching number of the outdoor unit itself, and then corrects the upper limit of the unit's output energy demand according to the outdoor ambient temperature, the ambient temperature of the air-conditioning indoor unit, the energy demand of the air-conditioning indoor unit and the average temperature of the human body, and then determines the output frequency of the unit compressor according to the corrected upper limit of the unit's output energy demand.

[0006] As a preferred method, the upper limit of the unit output energy requirement is corrected by F 需求 =∑Q×K / α; where: F 需求 is used to calculate the demand frequency; Q: total demand air conditioning indoor unit capacity; K: compressor displacement correction coefficient, K = 1; α is the proportional factor, which is determined according to the unit's own capacity.

[0007] Preferably, the total required air-conditioning indoor unit capacity Q is calculated as follows: Q = ∑(Qonj×Acj)+∑(Qoffk×Bc)+(∑QonN×Ec)+(∑QoffO×Fc); wherein, Qonj: the rated capacity of the j-th air-conditioning indoor unit in the on state; Qoffk: the rated capacity of the k-th air-conditioning indoor unit in the off state; QonN: the rated capacity of the hot water air-conditioning indoor unit in the on state; QoffO: the rated capacity of the hot water air-conditioning indoor unit in the off state; Acj: the capacity demand percentage of the next j-th air-conditioning indoor unit in the on state; Bc: the capacity demand percentage of the air-conditioning indoor unit in the off state, Bc = 0%; Ec: the hot water capacity demand percentage in the on state; Fc: the hot water capacity demand percentage in the off state, Fc = 0%.

[0008] Preferably, the calculation formula for the capacity requirement percentage Acj of the next j-th air conditioner indoor unit in the on state is: Acj = {[Taij×g×1.5]+0.9×(Touter loop-35)+100} / 100; wherein Taij is represented by: the ambient temperature of the j-th air conditioner indoor unit in the on state - the average human body temperature in the room; g is represented by: the compensation coefficient; Touter loop is represented by: the outdoor ambient temperature.

[0009] Preferably, the value range of Acj is [50%, 150%].

[0010] Preferably, the unit includes an electric heating device for assisting the water tank in heating the water tank; when the air conditioner indoor unit and the water tank perform heating work at the same time, the unit can determine whether to turn on the electric heating device according to the energy demand of the water tank.

[0011] Preferably, the electric heating is not turned on and the unit is in a normal hot water making mode; after the electric heating is turned on, the unit enters a fast hot water making mode.

[0012] Preferably, when the unit enters the fast hot water making mode, if the real-time indoor temperature is equal to the set indoor temperature, the refrigerant flow through the air conditioner indoor unit is reduced, the air outlet of the air conditioner indoor unit is reduced, and the refrigerant flow through the water tank is increased.

[0013] As a preferred embodiment, when the unit enters the normal hot water production mode, the comfort of the air conditioner is given priority, the water tank electric heating device is turned off, and the compressor output frequency of the unit is calculated according to the functional requirements of the air conditioner.

[0014] A Tianfu hot water heat pump multi-connected unit using the above-mentioned intelligent temperature control method.

[0015] The beneficial effect of the technical solution of the present invention is: the output frequency of the unit's outdoor unit is controlled by three factors: room ambient temperature, human body ambient temperature and set temperature, thereby making the room more comfortable, thereby achieving a better temperature control effect and accurately controlling the unit's energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a natural fluorine hot water heat pump multi-split unit.

[0017] Figure numerals: 1. outdoor unit; 2. air pipe; 3. air pipe stop valve; 4. air conditioner indoor unit; 5. liquid pipe; 6. liquid pipe stop valve; 7. air branch pipe; 8. first control valve; 9. liquid branch pipe; 10. second control valve; 11. water tank; 12. temperature sensing device. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] Example 1

[0024] An intelligent temperature control method for a Tianfu hot water heat pump multi-split unit determines the maximum energy demand value of the unit according to the horsepower of the outdoor unit itself, and then corrects the upper limit of the unit output energy demand according to the outdoor environment temperature, the environment temperature of the air conditioner indoor unit, the energy demand of the air conditioner indoor unit and the average temperature of the human body, and then determines the output frequency of the unit compressor according to the corrected upper limit of the unit output energy demand.

[0025] With this setting, the room comfort problem is controlled by controlling the output frequency of the unit's outdoor unit through three factors: room ambient temperature, human body ambient temperature and set temperature, thereby achieving a better temperature control effect and accurately controlling the unit's energy consumption.

[0026] In this embodiment, the upper limit F of the output energy required by the corrected unit is 需求 The calculation method is: F 需求 =∑Q×K / α; where: F 需求 is used to calculate the demand frequency; Q: total demand air conditioning indoor unit capacity; K: compressor displacement correction coefficient, K = 1; α is the proportional factor, which is determined according to the unit's own capacity.

[0027] Further preferably, the total required air conditioner indoor unit capacity Q is calculated as follows:

[0028] Q=∑(Qonj×Acj)+∑(Qoffk×Bc)+(∑QonN×Ec)+(∑QoffO×Fc);

[0029] Wherein, Qonj: the rated capacity of the jth air conditioner in the on state; Qoffk: the rated capacity of the kth air conditioner in the off state; QonN: the rated capacity of the hot water air conditioner in the on state; QoffO: the rated capacity of the hot water air conditioner in the off state;

[0030] Acj: the capacity requirement percentage of the next j-th air conditioner in the on state; Bc: the capacity requirement percentage of the air conditioner in the off state, Bc=0%; Ec: the hot water capacity requirement percentage in the on state; Fc: the hot water capacity requirement percentage in the off state, Fc=0%.

[0031] Further preferably, the calculation formula of the capacity requirement percentage Acj of the next j-th air conditioner indoor unit in the on state is as follows:

[0032] Acj = {[Taij × g × 1.5] + 0.9 × (Touter ring - 35) + 100} / 100;

[0033] Among them, Taij is represented by: the ambient temperature of the jth air conditioner indoor unit in the turned-on state minus the average human body temperature in the room; g is represented by: the compensation coefficient; T outer loop is represented by: the outdoor ambient temperature.

[0034] Among them, the value range of Acj is [50%, 150%].

[0035] Further preferably, the hot water capacity requirement percentage Ec in the on state is: the water tank capacity divided by the other machine capacity.

[0036] In this embodiment, the unit includes an electric heating device for assisting the water tank in heating the water tank; when the air conditioner indoor unit and the water tank perform heating work at the same time, the unit can determine whether to turn on the electric heating device according to the energy demand of the water tank.

[0037] Further preferably, when the energy demand of the water tank is greater than the set value, the electric heating unit is turned on to enter the fast hot water making mode, otherwise the electric heating unit is turned off to enter the normal hot water making mode; wherein, the energy demand of the water tank can be judged according to the difference between the real-time water temperature of the water tank and the preset water temperature of the water tank.

[0038] Further preferably, the electric heating is not turned on, and the unit is in a normal hot water making mode; after the electric heating is turned on, the unit enters a fast hot water making mode;

[0039] Among them, when the unit enters the fast hot water mode, if the indoor real-time temperature is equal to the indoor set temperature, the refrigerant flow through the air conditioner indoor unit is reduced, the air volume of the air conditioner indoor unit is reduced, and the refrigerant flow through the water tank is increased. In this way, the purpose of quickly heating water and compatibility with air conditioning comfort can be achieved;

[0040] Among them, when the unit enters the normal hot water making mode, the air conditioning comfort is prioritized, the water tank electric heating device is turned off, and the compressor output frequency of the unit is calculated according to the functional requirements of the air conditioner; this can reduce the energy consumption of the unit, prioritize the air conditioning part, and provide users with a better usage experience.

[0041] Further preferably, the unit also includes a wired controller, and the user can control the hot water making mode of the unit through the wired controller.

[0042] In this embodiment, the energy demand value is calculated by taking an integer, the frequency of the compressor output = 20 + 2 × (the upper limit of the corrected unit output energy demand F 需求 -1);

[0043] Further preferably, the upper limit of the unit output energy requirement and the output frequency of the unit compressor can be automatically matched by looking up a table. The upper limit of the unit output energy requirement and the output frequency of the unit compressor are matched as follows:

[0044] Energy Need frequency 1 20 2 22 3 24 4 26 5 28 6 30 7 24 8 26 9 28 … …

[0045] In this embodiment, when the air conditioner indoor unit executes the refrigeration water tank to perform hot water production, the conditions for turning on the electric heating device include:

[0046] Turn-on condition 1) The outdoor ambient temperature is 40℃, the outdoor unit has been running for more than 60 minutes, the water temperature set by the wire controller - the current water temperature is greater than 10℃, and the load rate of the air-conditioning indoor unit of the unit is less than or equal to 100%; Turn-on condition 2) All air-conditioning indoor units of the unit have stopped due to reaching the temperature, and the water temperature set by the wire controller - the current water temperature is greater than 5℃; If any of the above turning-on conditions is met, the electric heating device is turned on.

[0047] In this embodiment, when the air conditioner indoor unit executes the refrigeration water tank to perform hot water production, the conditions for shutting down the electric heating device include: shutting down condition 1) the demand for domestic hot water is zero; shutting down condition 2) the current water temperature ≥ the water temperature set by the wire controller -5°C; shutting down condition 3) the current actual refrigerant saturation temperature is greater than or equal to the target heating and cooling temperature -10°C; shutting down condition 4) the outdoor ambient temperature is greater than 40°C, where the allowable tolerance of the outdoor ambient temperature is 2°C; shutting down condition 5) the load rate of the air conditioner indoor unit of the air conditioner is greater than 105%, where the allowable tolerance of the load rate of the air conditioner indoor unit is 5%; if any of the above shutting down conditions is met, the electric heating device is shut down.

[0048] A multi-connected natural fluorine hot water heat pump unit, using the above intelligent temperature control method, such as Figure 1As shown, the unit includes an outdoor unit 1, a water tank 11 and a plurality of air conditioner indoor units 4, the water tank 11 and the plurality of air conditioner indoor units 4 are arranged in parallel, one port of the outdoor unit 1 is connected to the air conditioner indoor unit 4 through an air pipe 2, an air pipe stop valve 3 is arranged on the air pipe 2, one end of the air branch pipe 7 is connected to the air pipe 2 located between the air pipe stop valve 3 and the outdoor unit 1, the other end of the air branch pipe 7 is connected to the water tank fluorine road inlet of the water tank 11, the other port of the air conditioner indoor unit 4 is connected to the other port of the outdoor unit 1 through a liquid pipe 5, the liquid pipe stop valve 6 is installed on the liquid pipe 5, one end of the liquid branch pipe 9 is connected to the water tank fluorine road outlet of the water tank 11, and the other end of the liquid branch pipe 9 is connected to the liquid pipe 5 between the air conditioner indoor unit 4 and the liquid pipe stop valve 6; a first control valve 8 is installed at the water tank fluorine road inlet, and a second control valve 10 is installed at the water tank fluorine road outlet.

[0049] A temperature sensing device 12 for detecting human body temperature and indoor ambient temperature is installed at the air conditioner indoor unit 4. The temperature sensing device 12 is electrically connected to the control board of the outdoor unit 1. The temperature sensing device is an AI intelligent temperature control detector or an infrared thermometer.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. An intelligent temperature control method, characterized in that: The maximum energy demand of the unit is determined according to the matching number of the outdoor unit itself, and then the upper limit of the unit output energy demand is corrected according to the outdoor ambient temperature, the ambient temperature of the air conditioner indoor unit, the energy demand of the air conditioner indoor unit and the average human body temperature, and then the output frequency of the unit compressor is determined according to the corrected upper limit of the unit output energy demand.

2. An intelligent temperature control method according to claim 1, characterized in that: The method for correcting the upper limit of the unit output energy requirement is F 需求 =∑Q×K / α; where: F 需求 To calculate the demand frequency; Q: Total demand for air conditioning indoor unit capacity; K: Compressor displacement correction coefficient, K=1; α is the proportional factor, which is determined based on the unit's own capabilities.

3. An intelligent temperature control method according to claim 2, characterized in that: The total required air conditioning indoor unit capacity Q is calculated as: Q = ∑ (Qonj × Acj) + ∑ (Qoffk × Bc) + (∑QonN × Ec) + (∑QoffO × Fc); Wherein, Qonj: rated capacity of the j-th air conditioner in the on state; Qoffk: rated capacity of the k-th air conditioner in the off state; QonN: rated capacity of the hot water air conditioner in the on state; QoffO: rated capacity of the hot water air conditioner in the off state; Acj: capacity demand percentage of the next j-th air conditioner in the on state; Bc: capacity demand percentage of the air conditioner in the off state, Bc=0%; Ec: hot water capacity demand percentage in the on state; Fc: hot water capacity demand percentage in the off state, Fc=0%.

4. An intelligent temperature control method according to claim 3, characterized in that: The calculation formula for the capacity requirement percentage Acj of the next j-th air conditioner indoor unit in the on state is: Acj={[Taij×g×1.5]+0.9×(Touter ring-35)+100} / 100; Among them, Taij is represented by: the ambient temperature of the jth air conditioner indoor unit in the power-on state - the average human body temperature in the room; g is represented by: the compensation coefficient; Touter loop is represented by: the outdoor ambient temperature.

5. An intelligent temperature control method according to claim 4, characterized in that: The value range of Acj is [50%, 150%].

6. The intelligent temperature control method according to claim 1, characterized in that: The unit includes an electric heating device for assisting the water tank in heating the water tank; when the air conditioner indoor unit and the water tank perform heating work at the same time, the unit can determine whether to turn on the electric heating device according to the energy demand of the water tank.

7. The intelligent temperature control method according to claim 1, characterized in that: When the electric heating is not turned on, the unit is in normal hot water making mode; when the electric heating is turned on, the unit enters fast hot water making mode.

8. The intelligent temperature control method according to claim 1, characterized in that: When the unit enters the fast hot water mode, if the real-time indoor temperature is equal to the indoor set temperature, the refrigerant flow through the air conditioner indoor unit is reduced, the air output of the air conditioner indoor unit is reduced, and the refrigerant flow through the water tank is increased.

9. The intelligent temperature control method according to claim 1, characterized in that: When the unit enters normal hot water production mode, priority is given to ensuring air conditioning comfort, the water tank electric heating device is turned off, and the unit's compressor output frequency is calculated according to the air conditioning internal function requirements.

10. A Tianfu hot water heat pump multi-connected unit using an intelligent temperature control method according to any one of claims 1 to 9.

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