Control method of adaptive room load, storage medium and heat pump heating machine

Abstract

This invention discloses an adaptive room load control method, a storage medium, and a heat pump heating unit. A variable-volume buffer tank is installed between the return water pipe and the heating terminal of the heat pump heating unit. The method includes the following steps: S1, determining a constant 'a' based on different environmental conditions; S2, determining the return water temperature change rate ΔT based on information from a temperature sensor. 回水温 S3, based on the return water temperature change rate ΔT 回水温 The size between 'a' and 'a' changes the volume of the buffer tank. This structure allows for a smaller buffer tank volume when the room load is high, reducing the terminal water volume and allowing the unit to provide more heat to the room, meeting user needs and ensuring heating performance. Conversely, when the room load is low, the buffer tank volume is increased to maximize energy storage and achieve energy savings, thus reducing operating costs while meeting user needs.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat pump heating machines, in particular to a control method for self-adapting room load, a storage medium and a heat pump heating machine. BACKGROUND

[0002] Air source heat pump heating machine is a kind of machine which consumes energy to do work, absorbs heat from air (low temperature side), releases it after being raised to a higher temperature, heats water, and is used for indoor heating in winter; it can be used to replace existing boilers and can be used as an optimal technology for decentralized household heating. It is one of the most valuable energy-saving and carbon-reducing technologies in the 21st century, and its industrial development prospects are very broad.

[0003] However, the current heat pump heating machine usually has only one control strategy, including compressor frequency control, fan frequency control and other control strategies. Among them, the compressor frequency control strategy basically has only one set, and mainly controls the upper limit of the frequency of the compressor operation according to the external environment temperature. No matter the load size, there is only one control strategy, which cannot balance the use demand under the condition of large load and the energy saving under the condition of small load. Therefore, there is an urgent need for a control method for self-adapting room load, a storage medium and a heat pump heating machine to solve the above problems. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a control method for self-adapting room load, a storage medium and a heat pump heating machine.

[0005] An embodiment of the present application adopts the technical solution to solve its technical problem: a control method for self-adapting room load, applied to a heat pump heating machine, a buffer tank with variable volume is arranged between the return water pipe of the heat pump heating machine and the heating terminal, and the method comprises the following steps:

[0006] S1, determining a constant a according to different environments;

[0007] S2, determining the return water temperature change rate ΔT of the return water pipe according to the information fed back by the temperature sensor 回水温 ;

[0008] S3, changing the volume of the buffer tank according to the size between the return water temperature change rate ΔT 回水温 and a;

[0009] Wherein, ΔT 回水温 = (T2-T1) / t, T1 is the water temperature of the return water pipe at the previous moment, T2 is the water temperature of the return water pipe at the next moment, and t is the time interval between T2 and T1.

[0010] Preferably, in step S3, when the return water temperature change rate ΔT 回水温when a, the volume of the buffer water tank is controlled to be larger; when a, the volume of the buffer water tank is controlled to be smaller. 回水温 when a, the volume of the buffer water tank is controlled to be smaller.

[0011] Preferably, the heating load of the standard room is set as X1, the heating capacity of the heat pump heater is set as X2, and a = X2-X1.

[0012] Preferably, the constant a is set as 0.

[0013] Preferably, the constant a is set as 2.

[0014] Preferably, the environment at least includes the thermal insulation structure of the region or room where the heat pump heater is located.

[0015] Preferably, the heating terminal at least includes a floor heating coil, a heating radiator or an air conditioning indoor device.

[0016] A heat pump heater, comprising a memory, a processor and a heat pump heater control program stored on the memory and executable on the processor, wherein the heat pump heater control program is configured to implement the heat pump heater control method.

[0017] A storage medium, wherein a heat pump heater control program is stored on the storage medium, and the heat pump heater control program is executable on a processor to implement the heat pump heater control method.

[0018] The present application has the following advantages: a control method of self-adapting room load, a storage medium and a heat pump heater, a buffer water tank with variable volume is arranged between the return water pipe of the heat pump heater and the heating terminal, and the method comprises the following steps: S1, determining a constant a according to different environments; S2, determining the return water temperature change rate ΔT 回水温 of the return water pipe according to the information fed back by a temperature sensor; S3, changing the volume of the buffer water tank according to the size relationship between the return water temperature change rate ΔT 回水温 and a; wherein ΔT 回水温 =t, T1 is the water temperature of the return water pipe at a previous moment, T2 is the water temperature of the return water pipe at a next moment, and t is the time interval between T2 and T1; through the above structure, the volume of the buffer water tank is controlled to be smaller when the room load is larger, the terminal water volume is reduced, more heat of the unit is provided to the room, the use of the user is met, and the heating effect of the user is ensured; when the room load is smaller, the volume of the buffer water tank is controlled to be larger, the energy storage effect is maximized, the energy saving effect is realized, the energy is saved, and the operation cost of the unit is reduced under the condition of meeting the use of the user. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the following drawings, in which:

[0020] Figure 1 Flow chart for a control method for adaptive room load;

[0021] Figure 2 Flow chart for a first embodiment of a control method for adaptive room load;

[0022] Figure 3 Flow chart for a second embodiment of a control method for adaptive room load;

[0023] Figure 4 Schematic diagram of a heat pump heating machine. DETAILED DESCRIPTION

[0024] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0025] In the description of the present application, the meaning of multiple is more than two, greater than, less than, more than, etc. is not included in the number, above, below, within, etc. is included in the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0026] In the description of the present application, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and is not used to indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In the present application, unless otherwise explicitly limited, the words "set", "install", "connect" and the like should be understood broadly, for example, they can be directly connected, or indirectly connected through an intermediate medium; can be fixedly connected, or can be detachably connected, or can be integrally formed; can be mechanically connected; can be the internal communication of two elements or the interaction relationship between two elements. The person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0028] Reference Figures 1 to 4An adaptive room load control method is applied to a heat pump heating unit 10. A variable-volume buffer water tank 40 is installed between the return water pipe 20 and the heating terminal 30 of the heat pump heating unit 10. The method includes the following steps:

[0029] S1. Determine the constant a based on different environments;

[0030] S2. Determine the rate of change of return water temperature ΔT in return water pipe 20 based on the information fed back by the temperature sensor. 回水温 ;

[0031] S3, based on the return water temperature change rate ΔT 回水温 The size difference between 'a' and 'a' changes the volume of the buffer tank 40;

[0032] Where, ΔT 回水温 =T2-T1 / t, where T1 is the water temperature of return pipe 20 at the previous moment, T2 is the water temperature of return pipe 20 at the next moment, and t is the time interval between T2 and T1.

[0033] In this invention, a constant 'a' is set according to different environments. This constant 'a' can be set based on factors such as the region where the unit is located and the structure of the user's house. Specifically, it varies due to different insulation structures. When the insulation structure is good, the indoor temperature rises faster, the heat transfer temperature difference changes more significantly, and the return water temperature change rate gradually increases. When the insulation structure is poor, the indoor temperature rises slower, the heat transfer temperature difference changes less significantly, and the return water temperature change rate changes less. The constant 'a' can be obtained from the difference between the heating capacity of the heat pump heating unit 10 and the heating load of the standard room, which is X1, i.e., a = X2 - X1. The heat pump heating unit 10 is based on the return water temperature change rate ΔT. 回水温 The size difference between a and 'a' changes the volume of the buffer tank 40.

[0034] Reference Figures 1-2 In the first embodiment of the constant a, when the constant a is set to 0, the heating load of the standard room is 10KW, the heating capacity of the heat pump heating unit 10 is 10KW, and a = 10KW - 10KW = 0, at which point a balance is reached; when the heating load of the standard room is 12KW, X2 - X1 = -2 < 0, at which point the heating capacity of the heat pump heating unit 10 is < the heating load of the standard room, there is no excess heat to heat the water, and the return water temperature drops; when the heating load of the standard room is 8KW, X2 - X1 = 2 > 0, at which point the heating capacity of the heat pump heating unit 10 is > the heating load of the standard room, that is, there is excess heat to heat the water, and the return water temperature gradually rises.

[0035] Reference Figure 1 and 3, as the second embodiment of the constant a, when the constant a is set to 2, the heating load of the standard room is 8KW, the heating capacity of the heat pump heater 10 is 10KW, a=10KW-8KW=2, at this time the balance state is reached; When the heating load of the standard room is 10KW, X2-X1=0<2, at this time the heating capacity of the heat pump heater 10 is less than the heating load of the standard room, there is no excess heat to heat the water, and the return water temperature decreases; When the heating load of the standard room is 6KW, X2-X1=4>0, at this time the heating capacity of the heat pump heater 10 is greater than the heating load of the standard room, that is, there is excess heat to heat the water, and the return water temperature gradually rises.

[0036] Further, the constant a can be pre-set in the heat pump heater 10 for user selection, and the user can adjust it according to the region where the unit is located, the structure of the house and other factors; Further, after the heat pump heater 10 is started and runs stably for a period of time, the temperature in the return water pipe 20 of the heat pump heater 10 is detected by a temperature sensor and recorded as T1, and after the unit continues to run stably for a period of time, the temperature in the return water pipe 20 of the heat pump heater 10 is detected again and recorded as T2, and the return water temperature change rate ΔT 回水温 =T2-T1 / t is calculated, and then the load size of the current use scenario is judged, and then different control strategies are selected.

[0037] Specifically, after starting for a period of time, when the detected return water temperature change rate ΔT 回水温 >a, it is judged that the room load is small at this time, the required heat is small, that is, the room thermal insulation is good, at this time, the system will control the buffer tank 40 to increase the volume, to the greatest extent to realize the energy storage effect, realize the energy saving control of the heat pump heater 10, save energy and reduce the operating cost of the unit under the condition of meeting the user's use; When the detected return water temperature change rate ΔT 回水温 <a, it is judged that the room load is large at this time, the required heat is large, that is, the room thermal insulation is poor, at this time, the system will control the buffer tank 40 to reduce the volume, so that the terminal water volume decreases, and the heat of the unit is more provided to the room to meet the user's use and ensure the heating effect of the user; At this time, due to the decrease of the volume of the buffer tank 40, the volume of the water driven by the unit decreases, and the energy for heating water decreases, which can also realize the energy saving effect under the premise of meeting the comfort.

[0038] Further, in order to ensure the detection effect of the water temperature, the temperature sensor probe for detecting the temperature of the return water pipe 20 is preferably in direct contact with the water, and in order to accurately judge, ΔT 回水温 should be measured and calculated multiple times before the room load is judged; More temperature sensors can also be used to detect the room air temperature, water tank temperature and other detectable temperatures, and finally a comprehensive judgment is made.

[0039] The environment at least includes the heat preservation structure of the region or room where the heat pump heater 10 is located.

[0040] The heating terminal 30 at least includes a floor heating coil, a radiator, an air conditioner indoor device, a fan coil, a heat sink, etc.

[0041] A heat pump heater comprises a memory, a processor, and a heat pump heater control program stored on the memory and executable on the processor, the heat pump heater control program being configured to implement the heat pump heater control method.

[0042] A storage medium has a heat pump heater control program stored thereon, the heat pump heater control program being executable by a processor to implement the heat pump heater control method; and a heat pump heater is provided with an adaptive mode, the heat pump heater control method being executable when the adaptive mode is entered; a user can freely select to execute the control method in the application or to execute a conventional control method in the heat pump heater 10.

[0043] Reference Figure 4 A heat pump heater comprises a buffer water tank 40 connected between a return water pipe 20 and a heating terminal 30 and having a variable volume; the structure of the heat pump heater 10 is not described herein, and the hot water after heat exchange by the heat pump heater 10 is connected to the terminal application system of the heating terminal 30 through a water inlet pipe and is circulated back to the heat pump heater 10 through the return water pipe 20, and the buffer water tank 40 is connected between the return water pipe 20 and the heating terminal 30, wherein the buffer water tank 40 with a variable volume can be a water tank with a piston, the available volume of the water tank is changed by changing the position of the piston in the water tank, so as to change the volume of the buffer water tank 40, which is not limited herein.

[0044] The application has the advantages that when the room load is large, the volume of the buffer water tank 40 is controlled to be small, the terminal water volume is reduced, more heat of the unit is provided to the room, the use of the user is met, and the heating effect of the user is ensured; when the room load is small, the volume of the buffer water tank 40 is controlled to be large, the energy storage effect is maximally realized, the energy saving effect is realized, the energy is saved, and the operation cost of the unit is reduced under the condition that the use of the user is met.

[0045] Of course, the application is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the application, and these equivalent modifications and replacements are all included in the scope defined by the claims of the application.

Claims

1. Control method of the adaptive room load, applied in the heat pump heating machine (10), its characterized in that, The heat pump heating machine (10) is provided with a buffer water tank (40) with variable volume between the return water pipe (20) and the heating terminal (30), and the method comprises the following steps: S1, determining the constant a according to different environments, setting the heating load of the standard room as X1, the heating capacity of the heat pump heating machine (10) as X2, and a=X2-X1; S2, determining the return water temperature change rate AT of the return water pipe (20) according to the information fed back by the temperature sensor 回水温 ; S3. The volume of the buffer tank (40) is changed in accordance with the rate of change of the return water temperature ΔT 回水温 with a, when the rate of change of the return water temperature ΔT 回水温 >a, the volume of the buffer tank (40) is controlled to increase; when the rate of change of the return water temperature ΔT 回水温 <a, the volume of the buffer tank (40) is controlled to decrease; where ΔT 回水温 = (T2 - T1) / t, T1 is the water temperature of the return water pipe (20) at the previous moment, T2 is the water temperature of the return water pipe (20) at the next moment, and t is the time interval between T2 and T1.

2. The control method of adaptive room load according to claim 1, characterized in that: The constant a is set to 0.

3. The control method of adaptive room load according to claim 1, characterized in that: The constant a is set to 2.

4. The control method of adaptive room load according to claim 1, characterized in that: The environment at least includes the heat insulation structure of the region or room where the heat pump heating machine (10) is located.

5. The control method of adaptive room load according to claim 1, characterized in that: The heating terminal (30) at least includes a floor heating coil, a heating radiator or an air conditioning indoor device.

6. A heat pump heater, characterized by The heat pump heating machine comprises a memory, a processor and a heat pump heating machine control program stored on the memory and executable on the processor, and the heat pump heating machine control program is configured to implement the heat pump heating machine control method according to any one of claims 1 to 5.

7. A storage medium, characterized by The storage medium stores a heat pump heating machine control program, and the heat pump heating machine control program is executed by the processor to implement the heat pump heating machine control method according to any one of claims 1 to 5.

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