Heat pump system and control method and control device thereof

Abstract

The invention provides a heat pump system and a control method and device thereof. The heat pump system comprises a compressor, a water side heat exchanger, an air side heat exchanger and a four-way valve which are connected through a refrigerant pipeline; the water inlet and outlet pipe flows through the water-side heat exchanger and exchanges heat with the refrigerant pipeline; a machine room assembly is arranged on the outer side of the compressor and comprises a first machine room and a second machine room, the first machine room covers the outer side of the compressor, the second machine room is arranged on the outer side of the first machine room, the first machine room is used for absorbing noise of the compressor, the second machine room is provided with an energy storage layer used for storing energy, and an energy release water pipe flows through the energy storage layer. The energy discharging water pipe is communicated with the water inlet and outlet pipe and provided with a control valve. The engine room assembly formed by the first engine room and the second engine room is adopted to absorb the noise of the compressor and recover the waste heat of the compressor, so that the waste heat recovery can be realized while the noise is reduced, the system performance is improved, and the unnecessary energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and particularly to a heat pump system, a control method thereof, and a control device thereof. Background Art

[0002] In the related art, when an existing heat pump air-conditioning system uses a variable-frequency compressor, although the energy efficiency is improved, it also brings noise problems at the same time. The vibration and airflow noise generated by the compressor during operation are the main noise sources. Moreover, in a traditional heat pump system, the waste heat generated by the operation of the compressor is often not fully utilized and is directly discharged into the environment, resulting in energy waste. Waste heat recovery technology collects this part of heat through various means for preheating, heating, or other uses to improve the overall energy efficiency of the system.

[0003] In addition, in a low-temperature environment, the outdoor heat exchanger of the heat pump is prone to frosting, which will reduce the heat exchange efficiency and affect the performance of the heat pump. Most of the existing defrosting technologies rely on switching the working mode of the system and using the heat of the heat pump itself to melt the frost, but this method will cause the water temperature on the user side to drop and affect the user experience. Summary of the Invention

[0004] The present invention provides a heat pump system, a control method thereof, and a control device thereof, which are used to solve the defects existing in the prior art and achieve the following technical effects: The machine chamber assembly formed by the first machine chamber and the second machine chamber absorbs the noise of the compressor and recovers the waste heat of the compressor, so that while reducing the noise, the waste heat can be recovered, the system performance can be improved, and unnecessary energy consumption can be reduced.

[0005] The heat pump system according to the first aspect embodiment of the present invention includes: A compressor, a water-side heat exchanger, an air-side heat exchanger, and a four-way valve connected by a refrigerant pipeline; An inlet and outlet water pipe flowing through the water-side heat exchanger and exchanging heat with the refrigerant pipeline; An outer side of the compressor is provided with a machine chamber assembly, the machine chamber assembly includes a first machine chamber and a second machine chamber, the first machine chamber covers the outer side of the compressor, the second machine chamber is arranged on the outer side of the first machine chamber, and the first machine chamber is used to absorb the noise of the compressor, the second machine chamber has an energy storage layer for storing energy, and an energy release water pipe flows through the energy storage layer, and the energy release water pipe is communicated with the inlet and outlet water pipe and is provided with a control valve.

[0006] According to an embodiment of the present invention, the inner part of the housing of the second machine chamber is filled with a high thermal conductivity PCM material to form the energy storage layer, and the energy release water pipe is buried in the energy storage layer.

[0007] In this way, the present invention fills the second machine compartment with a high thermal conductivity PCM material and buries the energy-releasing water pipe therein, skillfully utilizing the phase change characteristics of the PCM material to achieve the recovery and storage of waste heat and the heat release under specific conditions (such as during defrosting), thereby achieving the purpose of improving the energy utilization efficiency of the heat pump system and the user comfort level.

[0008] According to an embodiment of the present invention, the first machine compartment is integrally formed with polyurethane foam. In this way, the polyurethane foam can effectively absorb these noises and convert them into heat energy, thereby reducing the impact of the noises on the surrounding environment.

[0009] According to an embodiment of the present invention, a plurality of ventilation holes are provided at the top of the first machine compartment, and the top of the second machine compartment is open and arranged around the outer periphery of the first machine compartment.

[0010] In this way, the function of the ventilation holes is to provide ventilation inside the sound-absorbing layer, thereby helping the compressor dissipate heat. On the one hand, it can avoid the working temperature of the compressor being too high. On the other hand, it can help the heat energy converted from sound energy to spread faster. And when the heat pump system is operating normally, the waste heat generated by the compressor and the heat energy converted from sound energy can be quickly absorbed and stored by the PCM material in the second machine compartment through the conduction of the first machine compartment.

[0011] According to an embodiment of the second aspect of the present invention, a control method for the heat pump system according to the embodiment of the first aspect of the present invention includes: Determine that the heat pump system enters the defrosting mode, and obtain the actual outlet water temperature and the target outlet water temperature of the inlet and outlet water pipes; According to the outlet water temperature difference between the actual outlet water temperature and the target outlet water temperature, control and adjust the opening degree of the control valve.

[0012] This control method ensures that during the defrosting process, the water temperature on the user side can remain relatively stable and will not fluctuate significantly due to the heat loss caused by defrosting, improving the user comfort level and satisfaction. At the same time, by precisely controlling the opening degree of the control valve, the system can more efficiently utilize the waste heat stored in the PCM material, avoid energy waste, and improve the overall energy efficiency of the heat pump system.

[0013] According to an embodiment of the present invention, the step of controlling and adjusting the opening degree of the control valve according to the outlet water temperature difference between the actual outlet water temperature and the target outlet water temperature specifically includes: When the outlet water temperature difference is less than zero, control the control valve to open; When the outlet water temperature difference is greater than zero, the control valve remains in the closed state.

[0014] In this way, through the above control strategy, the heat pump system can flexibly adjust the opening degree of the control valve according to the real-time change of the outlet water temperature, ensuring that the outlet water temperature is as close as possible to the target temperature set by the user, which not only meets the user's needs but also avoids energy waste and improves the overall energy efficiency of the system.

[0015] According to an embodiment of the present invention, in the case where the outlet water temperature difference is less than zero, the step of controlling the opening of the control valve specifically includes: Controlling and adjusting the opening degree of the control valve according to the range of the outlet water temperature difference; Wherein, the opening degree of the control valve is negatively correlated with the inlet and outlet water temperature difference.

[0016] This method of dynamically adjusting the opening degree of the control valve can accurately control the heat input according to the difference between the actual outlet water temperature and the target outlet water temperature, ensure that the outlet water temperature is stable at the set value, avoid energy waste at the same time, and improve the overall energy efficiency of the heat pump system.

[0017] According to an embodiment of the present invention, the control method of the heat pump system further includes: Obtaining the phase change temperature of the energy storage layer after complete phase change; Determining that the heat pump system enters the heating mode and obtaining the current energy storage temperature of the energy storage layer; Controlling and adjusting the opening degree of the control valve according to the comparison result between the energy storage temperature and the phase change temperature.

[0018] This control method makes full use of the phase change characteristics of the PCM material, realizes the efficient energy management and utilization of the heat pump system in the heating mode, ensures the stability of the outlet water temperature on the user side at the same time, and improves the user experience.

[0019] According to an embodiment of the present invention, the step of controlling and adjusting the opening degree of the control valve according to the comparison result between the energy storage temperature and the phase change temperature specifically includes: When the energy storage temperature is greater than the phase change temperature, controlling the opening of the control valve; When the energy storage temperature is less than or equal to the phase change temperature, the control valve remains in the closed state.

[0020] In this way, through accurate temperature monitoring and intelligent adjustment of the control valve, the system can flexibly adjust according to the actual situation in different operating modes to achieve the optimal energy utilization efficiency.

[0021] According to an embodiment of the third aspect of the present invention, the control device of the heat pump system according to the first aspect of the present invention includes: An acquisition module, configured to determine that the heat pump system enters a defrosting mode and acquire the actual outlet water temperature and the target outlet water temperature of the inlet and outlet water pipes; A control module, configured to control and adjust the opening degree of the control valve according to the water temperature difference between the actual outlet water temperature and the target outlet water temperature.

[0022] The present invention provides a heat pump system. The system uses a cabin assembly formed by a first cabin and a second cabin to absorb the noise of the compressor and recover the waste heat of the compressor. Thus, while reducing noise, waste heat recovery can be achieved, system performance can be improved, and unnecessary energy consumption can be reduced. Further, compared with the related art, the system has at least the following advantages.

[0023] (1) Noise reduction: The first cabin outside the compressor in the system uses sound-absorbing materials, which can effectively absorb the noise generated during the operation of the compressor, significantly reduce the overall machine noise level, and improve the user experience.

[0024] (2) Waste heat recovery: The energy storage layer included in the second cabin uses a phase change material (PCM). When the compressor is working, the sound-absorbing layer conducts the heat energy converted from sound energy and the waste heat of the compressor itself to the energy storage layer, and these heats are absorbed and stored by the phase change material, realizing the recovery and utilization of waste heat.

[0025] (3) Stable outlet water temperature during defrosting: During the defrosting process of the system, through the switching of the four-way valve and the intelligent management of the control valve, the heat stored in the energy storage layer is used to maintain the stability of the water temperature on the user side. Even under the defrosting condition, the outlet water temperature can be kept consistent with that before defrosting, improving the user comfort.

[0026] (4) Improvement of energy utilization rate: The effective control and utilization of waste heat in the system design not only reduce unnecessary energy consumption, but also improve the overall energy utilization rate of the system through the temperature compensation mechanism during defrosting.

[0027] (5) Intelligent control: The system automatically controls the opening and closing of the control valve by real-time monitoring of the temperature of the energy storage layer, ensuring that when the waste heat of the compressor is excessive, the excess heat can be taken away by circulating water in time to avoid energy waste.

[0028] In summary, the heat pump system shows obvious advantages in terms of noise reduction, waste heat recovery, outlet water temperature control during defrosting, and energy utilization efficiency, improving the overall performance of the heat pump and the user experience. Brief Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the heat pump system provided by the present invention.

[0031] Figure 2 It is one of the schematic structural diagrams of the housing assembly provided by the present invention.

[0032] Figure 3 It is another schematic structural diagram of the housing assembly provided by the present invention.

[0033] Figure 4 It is a schematic structural diagram of the first housing provided by the present invention.

[0034] Figure 5 It is a schematic structural diagram of the second housing provided by the present invention.

[0035] Figure 6 It is a schematic flow diagram of the control method of the heat pump system provided by the present invention.

[0036] Figure 7 It is a schematic structural diagram of the control device of the heat pump system provided by the present invention.

[0037] Figure 8 It is a schematic structural diagram of the electronic device provided by the present invention. Description of the Drawings: 1. Compressor; 2. Four-way valve; 3. Air-side heat exchanger; 4. Water-side heat exchanger; 5. Electronic expansion valve; 61. First machine compartment; 611. Vent hole; 62. Second machine compartment; 63. Energy-releasing water pipe; 64. Control valve; 7. Inlet and outlet water pipes. Detailed Embodiments

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0040] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean 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 embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0041] As Figures 1 to 5 shown, the heat pump system according to the embodiment of the first aspect of the present invention includes a compressor 1, a water-side heat exchanger 4, an air-side heat exchanger 3, a four-way valve 2, an inlet and outlet water pipe 7, and a machine compartment assembly.

[0042] The compressor 1, the water-side heat exchanger 4, the air-side heat exchanger 3, and the four-way valve 2 are connected by a refrigerant pipeline; the inlet and outlet water pipe 7 flows through the water-side heat exchanger 4 and exchanges heat with the refrigerant pipeline.

[0043] A machine compartment assembly is arranged outside the compressor 1. The machine compartment assembly includes a first machine compartment 61 and a second machine compartment 62. The first machine compartment 61 covers the outside of the compressor 1, and the second machine compartment 62 is arranged outside the first machine compartment 61. The first machine compartment 61 is used to absorb the noise of the compressor 1, and the second machine compartment 62 has an energy storage layer for storing energy. An energy release water pipe 63 flows through the energy storage layer. The energy release water pipe 63 is connected to the inlet and outlet water pipe 7 and is provided with a control valve 64.

[0044] It should be noted that the innovation point of this system lies in that a machine compartment assembly is arranged outside the compressor 1. Specifically, the machine compartment assembly is composed of a first machine compartment 61 and a second machine compartment 62. The first machine compartment 61 covers the outside of the compressor 1 and has a sound absorption function to reduce the noise when the compressor 1 works; the second machine compartment 62 is arranged outside the first machine compartment 61 and has an energy storage layer inside for storing energy. It is connected to the inlet and outlet water pipe 7 through the energy release water pipe 63, and is provided with a control valve 64 to control the water flow.

[0045] The working principle and process of the heat pump system according to the embodiment of the present invention are introduced as follows.

[0046] When the heat pump system is operating, the compressor 1 generates noise and waste heat. To reduce the noise and make full use of the waste heat, a double-layer cabin structure is designed for the system. The first cabin 61 is closely attached to the compressor 1 and uses sound-absorbing materials to effectively absorb the noise generated by the compressor 1 and reduce interference to the outside world. The second cabin 62 is located outside the first cabin 61 and has an energy storage layer inside. Using phase change materials (PCMs), it can store the excess heat generated during the operation of the compressor 1. When the compressor 1 is in normal operation, the control valve 64 is in the closed state, preventing the water circuit from directly contacting the energy storage layer and avoiding unnecessary heat dissipation.

[0047] When the system needs to perform a defrosting operation, the working mode is switched through the four-way valve 2, and the system starts to monitor the outlet water temperature. Once it is found that the outlet water temperature drops, indicating that defrosting is in progress, the control valve 64 is opened at this time to allow the water circuit to pass through the energy storage layer and exchange heat with the phase change material stored therein. By adjusting the water flow rate, it can be ensured that the water temperature on the user side during the defrosting process remains the same as before defrosting, without affecting the user experience. After the defrosting is completed, the control valve 64 is closed again to prevent the water circuit from continuing to interact with the energy storage layer.

[0048] In the normal heating mode of the system, if it is detected that the temperature of the energy storage layer exceeds the preset complete phase change temperature, this indicates that there is still excess heat in the energy storage layer that has not been fully utilized. At this time, the control valve 64 will be opened again, enabling the energy storage layer to heat the water flow in the inlet and outlet pipes 7, playing an auxiliary heating role, helping the outlet water temperature quickly reach the temperature set by the user, and meeting the user's heating demand. In this way, the waste heat generated by the compressor 1 is effectively utilized, improving the overall energy efficiency of the heat pump system. When the temperature of the energy storage layer drops below the preset complete phase change temperature, the control valve 64 automatically closes, waiting for the next waste heat storage cycle to ensure that the energy storage layer can continuously absorb the waste heat of the compressor 1. This design fully reflects the efficient utilization of the waste heat of the compressor 1 by the heat pump system, achieving the dual goals of noise reduction and energy recovery.

[0049] It should be noted that in the heat pump system, the energy storage layer of the second cabin 62 not only utilizes the waste heat during the operation of the compressor 1, but also utilizes the process of converting the noise of the compressor 1 into heat energy by the first cabin 61. Specifically, the first cabin 61 (made of polyurethane foam, for example) serves as a sound-absorbing layer, which can absorb the noise generated during the operation of the compressor 1 and convert the sound energy into heat energy. This part of the heat energy is then guided to the energy storage layer of the second cabin 62 through the air vents to heat the phase change material (PCM) and promote its phase change, storing a large amount of latent heat. At the same time, the waste heat dissipated by the compressor 1 during high-frequency operation will also be conducted to the energy storage layer through the sound-absorbing layer, further promoting the phase change of the PCM and increasing the heat storage. Therefore, the energy source of the energy storage layer is multi-faceted, including both the waste heat directly generated by the compressor 1 and the heat energy converted from noise.

[0050] In summary, through such a design, the heat pump system not only solves the noise problem, but also realizes the recovery and utilization of waste heat, improves the overall energy efficiency of the system, ensures the stability of the water temperature on the user side during defrosting, and improves the user experience.

[0051] In related technologies, when using a variable frequency compressor in an existing heat pump air conditioning system, although the energy efficiency is improved, it also brings noise problems at the same time. The vibration and airflow noise generated by the compressor during operation are the main noise sources. Moreover, in a traditional heat pump system, the waste heat generated by the operation of the compressor is often not fully utilized and is directly discharged into the environment, resulting in energy waste. Waste heat recovery technology collects this part of heat through various means for preheating, heating or other uses to improve the overall energy efficiency of the system.

[0052] In addition, in a low-temperature environment, the outdoor heat exchanger of the heat pump is prone to frosting, which will reduce the heat exchange efficiency and affect the performance of the heat pump. Most existing defrosting technologies rely on switching the system working mode and using the heat of the heat pump itself to melt the frost, but this method will cause the water temperature on the user side to drop and affect the user experience.

[0053] Therefore, in order to solve the technical defects existing in the above-mentioned related technologies, the present invention provides a heat pump system. This system uses the cabin assembly formed by the first cabin 61 and the second cabin 62 to absorb the noise of the compressor 1 and recover the waste heat of the compressor 1, so that while reducing noise, waste heat recovery can be realized, the system performance can be improved, and unnecessary energy consumption can be reduced. Further, this system has at least the following advantages compared with related technologies.

[0054] (1) Noise reduction: The first cabin 61 outside the compressor 1 in the system uses sound-absorbing materials, which can effectively absorb the noise generated during the operation of the compressor 1, significantly reduce the overall noise level of the machine, and improve the user experience.

[0055] (2) Waste heat recovery: The energy storage layer included in the second cabin 62 uses a phase change material (PCM). When the compressor 1 is working, the heat energy converted from sound energy by the sound-absorbing layer and the waste heat of the compressor 1 itself are conducted to the energy storage layer, and these heats are absorbed and stored by the phase change material, realizing the recovery and utilization of waste heat.

[0056] (3) Stable water outlet temperature during defrosting: During the defrosting process of the system, through the switching of the four-way valve 2 and the intelligent management of the control valve 64, the heat stored in the energy storage layer is used to maintain the stability of the water temperature on the user side, that is, even under the defrosting condition, the water outlet temperature can be kept the same as before defrosting, improving the user comfort.

[0057] (4) Improvement of energy utilization rate: The effective control and utilization of waste heat in the system design not only reduce unnecessary energy consumption, but also improve the overall energy utilization rate of the system through the temperature compensation mechanism during defrosting.

[0058] (5) Intelligent control: The system automatically controls the opening and closing of the control valve 64 by monitoring the temperature of the energy storage layer in real time, ensuring that excess heat from the waste heat of the compressor 1 can be taken away by circulating water in a timely manner to avoid energy waste.

[0059] In summary, this heat pump system exhibits obvious advantages in terms of noise reduction, waste heat recovery, water outlet temperature control during defrosting, and energy utilization efficiency, improving the overall performance and user experience of the heat pump.

[0060] As Figure 1 shown, according to some embodiments of the present invention, an electronic expansion valve 5 is further provided in the heat pump system, and the electronic expansion valve 5 is located between the water-side heat exchanger 4 and the air-side heat exchanger 3.

[0061] As Figures 2 to 5 shown, according to some embodiments of the present invention, the interior of the housing of the second machine compartment 62 is filled with a high thermal conductivity PCM material to form an energy storage layer, and the heat release water pipe 63 is buried in the energy storage layer.

[0062] In the embodiments of the present invention, the interior of the housing of the second machine compartment 62 is filled with a high thermal conductivity PCM material to construct an energy storage layer. PCM, the full name is Phase Change Material, that is, phase change material, is a material that can undergo a physical phase change (from solid state to liquid state or vice versa) within a certain temperature range, and is accompanied by the characteristics of absorbing or releasing a large amount of latent heat. During the phase change process of the phase change material, although the temperature remains constant, the change of its state enables a large amount of thermal energy to be stored or released, and this characteristic makes it an ideal thermal energy storage medium.

[0063] In the heat pump system, the application of the PCM material is mainly reflected in two aspects: one is as a thermal energy storage medium. When the compressor 1 operates, the PCM material will absorb and store the waste heat generated by the compressor 1 and the thermal energy converted from sound energy, and these thermal energies cause the PCM to change from solid state to liquid state, that is, a phase change occurs; the other is when the system needs heat, such as during the defrosting process, the PCM material then releases the previously stored thermal energy to help maintain the stability of the ambient temperature, or directly used to heat the circulating water to increase the water outlet temperature, ensuring that the water temperature on the user side remains unchanged during defrosting.

[0064] In the heat pump system of the present invention, the energy-releasing water pipe 63 is buried in the energy storage layer, that is, in the high thermal conductivity PCM material, to facilitate rapid heat exchange. When the system enters the defrost mode, if it detects that the outlet water temperature has dropped, the system will open the solenoid valve to allow the water path to pass through the energy storage layer and exchange heat with the phase change material. At this time, according to the magnitude of the change in the outlet water temperature, the system will adjust the water path flow accordingly to ensure that the water temperature on the user side during defrosting is consistent with that before defrosting. After defrosting is completed, if it is detected that the temperature of the energy storage layer is still higher than the temperature after the phase change, the system will open the solenoid valve again and use circulating water to take away excess heat until the temperature of the energy storage layer drops below the phase change point.

[0065] In this way, the present invention fills the second compartment 62 with high thermal conductivity PCM material and buries the energy-releasing water pipe 63 therein, ingeniously utilizing the phase change characteristics of the PCM material to achieve waste heat recovery and storage, as well as heat release under specific conditions (such as defrosting), thereby achieving the purpose of improving the energy utilization efficiency of the heat pump system and user comfort.

[0066] According to some embodiments of the present invention, the first cabin 61 is integrally formed of polyurethane foam. It should be explained that polyurethane foam is a polymer foam material generated by the reaction of isocyanate and polyol, and can be divided into two types: soft and hard according to its hardness. Polyurethane foam has the following characteristics: (1) Excellent elasticity and softness: Soft polyurethane foam has excellent elasticity and can restore its shape while maintaining a soft feel. (2) High elongation and compression strength: Polyurethane foam can deform well without breaking when subjected to pressure, and can restore its original shape after the pressure is removed, thanks to its high elongation and compression strength. (3) Chemical stability: Polyurethane foam has good resistance to many solvents and oils and is not easily corroded. (4) Wear resistance: Compared with natural sponges, polyurethane foam has better wear resistance, which is usually about 20 times that of natural sponges. (5) Sound absorption performance: Due to its porous structure, polyurethane foam has excellent sound absorption performance, which can effectively absorb sound energy and reduce noise transmission.

[0067] like Figures 2 to 5 As shown, in the heat pump system of the present invention, the first machine chamber 61 is integrally formed with polyurethane foam, mainly to utilize its excellent sound absorption performance. The compressor 1 generates noise during operation, and the polyurethane foam can effectively absorb the noise and convert it into heat energy, thereby reducing the impact of the noise on the surrounding environment. In addition, the process of integrally forming the polyurethane foam can ensure that the machine chamber has good sealing and structural strength, which is conducive to improving the overall performance and durability of the heat pump system.

[0068] Integral molding means that the polyurethane foam is formed as a continuous body in a mold through the foaming process. This enables the first compartment 61 to closely fit the outer shape of the compressor 1, providing a uniform sound absorption effect. At the same time, it also simplifies the manufacturing process and reduces production costs. Since the polyurethane foam has good chemical stability and wear resistance, the compartment made of this material also has a long service life and can maintain its sound absorption effect for a long time without frequent replacement.

[0069] As Figures 2 to 5 shown, according to some embodiments of the present invention, a plurality of ventilation holes 611 are provided at the top of the first compartment 61, and the top of the second compartment 62 is open and disposed around the outer periphery of the first compartment 61.

[0070] In this embodiment, the function of the ventilation holes 611 is to provide ventilation inside the sound absorption layer, thereby helping the compressor 1 dissipate heat. On the one hand, it can prevent the working temperature of the compressor 1 from being too high. On the other hand, it can help the heat energy converted from sound energy to spread faster. Specifically, the noise generated by the compressor 1 during operation is absorbed by the polyurethane foam sound absorption layer inside the first compartment 61. This sound absorption layer can not only reduce noise but also convert sound energy into heat energy. The converted heat energy is not directly transmitted to the outside through the ventilation holes 611, but first accumulates inside the sound absorption layer. Subsequently, through the heat conduction of the sound absorption layer, these heat energies are transmitted to the energy storage layer of the second compartment 62 adjacent to the sound absorption layer.

[0071] In this way, the design of the ventilation holes 611 not only takes into account the sound absorption requirements but also takes into account the discharge of the heat generated during the operation of the compressor 1, avoiding the internal temperature of the compartment being too high and affecting the equipment performance. In addition, the top of the second compartment 62 is open, which can cooperate with the design of the ventilation holes 611 at the top of the first compartment 61 to avoid interference from the second compartment 62 during the ventilation process of the ventilation holes 611. And since the second compartment 62 is disposed around the outer periphery of the first compartment 61, during the normal operation of the heat pump system, the waste heat generated by the compressor 1 and the heat energy converted from sound energy can be quickly absorbed and stored by the PCM material in the second compartment 62 through the conduction of the first compartment 61.

[0072] According to some embodiments of the present invention, through experimental testing, the total heat Qa required for the defrosting process can be measured, and thus the mass required for the complete phase change of the PCM material in the energy storage layer can be deduced, that is, the mass of the PCM material required for the energy storage layer can be determined.

[0073] It can be understood that in the embodiments of the present invention, by experimentally testing the total heat Qa during the defrosting process, the exact mass required for the complete phase change of the phase change material (PCM) in the energy storage layer can be determined. This process is based on the phase change characteristics of the PCM material and the actual operation data of the heat pump system.

[0074] First, the total heat Qa consumed by the system during the entire defrosting process was measured in the experiment. This includes all the energy used for defrosting, but does not include the heat converted from sound energy. From this value, it can be understood how much heat the system needs to complete the defrosting task during defrosting.

[0075] Secondly, the PCM material absorbs or releases a certain amount of latent heat during phase change. When the PCM changes from a solid state to a liquid state, it absorbs heat, and the amount of heat absorbed during this process is related to the mass of the PCM and the latent heat of phase change. The latent heat of phase change refers to the heat absorbed or released per unit mass of PCM during the phase change process, usually denoted by the symbol L, and the unit is joules per gram (J / g). From the total heat Qa measured through the experiment, we can use the calculation formula among the latent heat of phase change, the total heat, and the mass to calculate the theoretical mass m required for the complete phase change of the PCM.

[0076] This calculation method can help the system determine how much PCM material should be used when designing the energy storage layer to ensure that all the required heat can be completely absorbed during defrosting to achieve phase change. At the same time, this also means that after defrosting, the PCM material can store enough heat for subsequent use, such as releasing the heat when needed to increase the outlet water temperature and improve the user experience after defrosting.

[0077] In this way, by accurately calculating the mass of the PCM material, the energy storage design of the heat pump system can be optimized, the energy utilization efficiency can be improved, and at the same time, it is ensured that the system can operate effectively in the defrost mode, maintain the stability of the outlet water temperature, and enhance the user experience.

[0078] Next, the control method, control device, and heat pump system of the heat pump system proposed by the present invention will be described with reference to the accompanying drawings. Among them, before describing the embodiments of the present invention in detail, the entire application scenario will be described first. The control method, control device, electronic device, and computer-readable storage medium of the heat pump system according to the embodiments of the present invention can be applied not only to the local heat pump system but also to the cloud platform in the Internet field, or the cloud platform in other types of Internet fields, or can also be applied to third-party devices. Among them, the third-party devices may include various different types such as mobile phones, tablets, laptops, in-vehicle computers, and other intelligent terminals.

[0079] Next, only the control method applicable to the heat pump system will be used as an example for illustration. It should be understood that the control method of the embodiments of the present invention can also be applicable to the cloud platform and third-party devices.

[0080] As Figure 6 shown, the control method of the heat pump system according to the second aspect embodiment of the present invention includes: Step S1, determine that the heat pump system enters the defrost mode, and obtain the actual outlet water temperature and the target outlet water temperature of the inlet and outlet pipes 7; Step S2: Control and adjust the opening degree of the control valve 64 according to the water outlet temperature difference between the actual water outlet temperature and the target water outlet temperature.

[0081] According to the control method of the heat pump system according to the embodiments of the present invention, its specific working process and principle are as follows: The system enters the defrosting mode. When the heat pump system detects a situation that requires defrosting, that is, there is frost accumulation on the surface of the evaporator, which affects the heat exchange efficiency, the system will automatically switch to the defrosting mode. After the defrosting mode is started, the system will obtain the actual water outlet temperature of the inlet and outlet water pipes 7 and the target water outlet temperature set by the user. The actual water outlet temperature reflects the current working state of the system, while the target water outlet temperature is the water outlet temperature expected by the user. These two temperature values are very important for subsequent control.

[0082] Adjust the opening degree of the control valve 64 according to the water outlet temperature difference. The system calculates the difference between the actual water outlet temperature and the target water outlet temperature, that is, the water outlet temperature difference ΔTa. If ΔTa is less than 0, it means that the actual water outlet temperature is lower than the target water outlet temperature. At this time, the system needs to increase the water outlet temperature to reach the target value. To achieve this, the system will control and adjust the opening degree of the control valve 64 to allow more water paths to pass through the energy storage layer and exchange heat with the phase change material, so as to absorb the heat previously converted from the waste heat and sound energy of the compressor 1 and increase the water outlet temperature.

[0083] Among them, the adjustment of the opening degree of the control valve 64 is based on the magnitude of ΔTa. The larger ΔTa is, the larger the opening degree of the control valve 64 is to accelerate the heat transfer, and vice versa. When ΔTa approaches zero, that is, the actual water outlet temperature is close to the target water outlet temperature, the opening degree of the control valve 64 will gradually decrease until it is completely closed to avoid overheating and keep the water outlet temperature stable.

[0084] This control method ensures that during the defrosting process, the water temperature on the user side can be kept relatively stable and will not fluctuate greatly due to the heat loss caused by defrosting, improving the comfort and satisfaction of users. At the same time, by precisely controlling the opening degree of the control valve 64, the system can make more efficient use of the waste heat stored in the PCM material, avoid energy waste, and improve the overall energy efficiency of the heat pump system.

[0085] According to some embodiments of the present invention, the step of controlling and adjusting the opening degree of the control valve 64 according to the water outlet temperature difference between the actual water outlet temperature and the target water outlet temperature specifically includes: When the water outlet temperature difference is less than zero, control the control valve 64 to open; When the water outlet temperature difference is greater than zero, the control valve 64 remains in the closed state.

[0086] It can be understood that when the system detects that the actual outlet water temperature is lower than the target outlet water temperature, that is, when the outlet water temperature difference is less than zero, the system will control the control valve 64 to open. At this time, the opening of the control valve 64 allows the water circuit to exchange heat with the phase change material (PCM) in the energy storage layer, thereby using the previously stored heat to increase the outlet water temperature and make it close to or reach the target outlet water temperature.

[0087] Conversely, if it is detected that the actual outlet water temperature is higher than the target outlet water temperature, that is, when the outlet water temperature difference is greater than zero, the control valve 64 will remain closed. This means that the system believes that the current outlet water temperature is already sufficient and no additional heat input is required. Therefore, there is no need to open the control valve 64 to allow the water circuit to pass through the energy storage layer, avoiding unnecessary energy consumption.

[0088] In this way, through the above control strategy, the heat pump system can flexibly adjust the opening degree of the control valve 64 according to the real-time change of the outlet water temperature, ensuring that the outlet water temperature is as close as possible to the target temperature set by the user. This not only meets the user's needs but also avoids energy waste and improves the overall energy efficiency of the system.

[0089] In some embodiments of the present invention, in the case where the outlet water temperature difference is less than zero, the step of controlling the control valve 64 to open specifically includes: According to the range of the outlet water temperature difference, control and adjust the opening degree of the control valve 64, where the opening degree of the control valve 64 is negatively correlated with the inlet and outlet water temperature difference.

[0090] In the embodiments of the present invention, when it is detected that the actual outlet water temperature is lower than the target outlet water temperature, that is, when the outlet water temperature difference is less than zero, the control system will dynamically adjust the opening degree of the control valve 64 according to the magnitude of the outlet water temperature difference. Specifically, the opening degree of the control valve 64 is negatively correlated with the inlet and outlet water temperature difference, that is, the smaller the outlet water temperature difference (i.e., the closer the actual outlet water temperature is to the target outlet water temperature), the smaller the opening degree of the control valve 64; on the contrary, the larger the outlet water temperature difference (i.e., the greater the difference between the actual outlet water temperature and the target outlet water temperature), the larger the opening degree of the control valve 64.

[0091] For example, assuming the target outlet water temperature is 50 °C, in the following three cases, the opening degree of the control valve 64 is adjusted as follows: the actual outlet water temperature is 48 °C, and the outlet water temperature difference is -2 °C. In this case, since the actual outlet water temperature is 2 °C lower than the target temperature, the system will detect that the outlet water temperature difference is less than zero, and at this time, the opening degree of the control valve 64 will be adjusted to a moderately large position to increase the chance of water flow passing through the energy storage layer and use the stored heat to increase the outlet water temperature.

[0092] The actual outlet water temperature is 49°C, and the outlet water temperature difference is -1°C. When the difference between the actual outlet water temperature and the target temperature is reduced to 1°C, the system will adjust the opening degree of the control valve 64 to a smaller position. Since the actual outlet water temperature is close to the target temperature and only a small amount of heat is required to reach the target, the opening degree of the control valve 64 does not need to be too large.

[0093] The actual outlet water temperature is 49.5°C, and the outlet water temperature difference is -0.5°C. When the actual outlet water temperature is almost equal to the target temperature and the outlet water temperature difference is very small, the system will adjust the opening degree of the control valve 64 to the minimum or completely close it to prevent overheating and ensure that the outlet water temperature is stable near the target value.

[0094] This method of dynamically adjusting the opening degree of the control valve 64 can accurately control the heat input according to the difference between the actual outlet water temperature and the target outlet water temperature, ensure that the outlet water temperature is stable at the set value, avoid energy waste at the same time, and improve the overall energy efficiency of the heat pump system. Through this refined control strategy, users can obtain a more comfortable and stable hot water supply while reducing the operating costs.

[0095] According to some embodiments of the present invention, the control method of the heat pump system further includes: Obtaining the phase change temperature of the energy storage layer after complete phase change; Determining that the heat pump system enters the heating mode and obtaining the current energy storage temperature of the energy storage layer; Controlling and adjusting the opening degree of the control valve 64 according to the comparison result between the energy storage temperature and the phase change temperature.

[0096] In this embodiment, first of all, the system needs to know the phase change temperature (Tb) of the energy storage layer after complete phase change. This refers to the temperature at which the PCM material changes from solid state to liquid state, and it is also the point where it stores the maximum latent heat.

[0097] The system monitors the operating state and confirms that the heat pump has entered the heating mode. In the heating mode, the working objective of the heat pump is to transfer the external heat to the indoor to increase the indoor temperature. In the heating mode, the system also needs to obtain the current temperature (Tc) of the energy storage layer in real time. This step is to understand the current state of the PCM material in the energy storage layer, that is, whether it has undergone phase change, the degree of phase change, and whether there is remaining sensible heat or latent heat available for utilization.

[0098] The system compares the energy storage temperature Tc with the phase change temperature Tb to judge the state of the energy storage layer. If Tc>Tb, it indicates that the PCM material in the energy storage layer has completely undergone phase change and the temperature exceeds the phase change point, and there is excess heat.

[0099] Based on the comparison result of Tc and Tb, the system will adjust the opening degree of the control valve 64. If Tc > Tb, the system will open the control valve 64 to allow the circulating water to pass through the energy storage layer, heating the circulating water with the excess heat of the PCM material, thereby increasing the outlet water temperature and providing more efficient heating service for users. On the contrary, if Tc ≤ Tb, that is, the temperature of the energy storage layer has not reached the phase change temperature or is just equal, the control valve 64 will remain closed to avoid the premature contact of the circulating water with the PCM material that has not fully undergone phase change, so as to save more latent heat for subsequent heating requirements.

[0100] This control method makes full use of the phase change characteristics of the PCM material, realizes the efficient energy management and utilization of the heat pump system in the heating mode, ensures the stability of the outlet water temperature on the user side, and improves the user experience. Through precise temperature monitoring and intelligent adjustment of the control valve 64, the system can flexibly adjust according to the actual situation under different operating modes to achieve the optimal energy utilization efficiency.

[0101] Further, the step of controlling and adjusting the opening degree of the control valve 64 according to the comparison result between the energy storage temperature and the phase change temperature specifically includes: When the energy storage temperature is greater than the phase change temperature, control the control valve 64 to open; When the energy storage temperature is less than or equal to the phase change temperature, the control valve 64 remains in the closed state.

[0102] For example, judge the actual energy storage temperature Tc of the energy storage layer every 3 minutes. If Tc > Tb, open the control valve 64 to heat the circulating water, and judge Tc every 30 seconds after opening the valve. When Tc ≤ Tb, close the control valve 64.

[0103] As Figure 7 shown, the control device of the heat pump system according to the third aspect embodiment of the present invention includes: An acquisition module 110, configured to determine that the heat pump system enters the defrosting mode and acquire the actual outlet water temperature and the target outlet water temperature of the inlet and outlet pipes 7; A control module 120, configured to control and adjust the opening degree of the control valve 64 according to the outlet water temperature difference between the actual outlet water temperature and the target outlet water temperature.

[0104] Figure 8 Illustrates a schematic physical structure diagram of an electronic device, as Figure 8As shown, the electronic device may include: a processor 810, a communications interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communications interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call the logical instructions in the memory 830 to execute the control method of the heat pump system, including: determining that the heat pump system enters the defrosting mode, obtaining the actual water outlet temperature and the target water outlet temperature of the inlet and outlet water pipes 7; controlling and adjusting the opening degree of the control valve 64 according to the water outlet temperature difference between the actual water outlet temperature and the target water outlet temperature.

[0105] In addition, when the logical instructions in the above-mentioned memory 830 are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0106] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the heat pump system provided by the above-mentioned various methods, including: determining that the heat pump system enters the defrosting mode, obtaining the actual water outlet temperature and the target water outlet temperature of the inlet and outlet water pipes 7; controlling and adjusting the opening degree of the control valve 64 according to the water outlet temperature difference between the actual water outlet temperature and the target water outlet temperature.

[0107] On another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it is implemented to execute the control method of the heat pump system provided by the above-mentioned various methods, including: determining that the heat pump system enters the defrosting mode, obtaining the actual water outlet temperature and the target water outlet temperature of the inlet and outlet water pipes 7; controlling and adjusting the opening degree of the control valve 64 according to the water outlet temperature difference between the actual water outlet temperature and the target water outlet temperature.

[0108] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative labor.

[0109] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on such an understanding, the essence of the above technical solution, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat pump system, characterized in that, Comprising: A compressor, a water-side heat exchanger, an air-side heat exchanger and a four-way valve connected by a refrigerant pipeline; Inlet and outlet water pipes, flowing through the water-side heat exchanger and exchanging heat with the refrigerant pipeline; An engine compartment assembly is arranged outside the compressor. The engine compartment assembly includes a first engine compartment and a second engine compartment. The first engine compartment covers the outside of the compressor. The second engine compartment is arranged outside the first engine compartment. And the first engine compartment is used to absorb the noise of the compressor. The second engine compartment has an energy storage layer for storing energy. A heat release water pipe flows through the energy storage layer. The heat release water pipe is connected to the inlet and outlet water pipes and is provided with a control valve.

2. The heat pump system according to claim 1, wherein, The inside of the shell of the second engine compartment is filled with a high thermal conductivity PCM material to form the energy storage layer. The heat release water pipe is buried in the energy storage layer.

3. The heat pump system according to claim 1, characterized in that The first engine compartment is integrally formed with polyurethane foam.

4. The heat pump system according to any one of claims 1 to 3, characterized in that A plurality of ventilation holes are opened at the top of the first engine compartment. The top of the second engine compartment is open and is arranged around the outer periphery of the first engine compartment.

5. A control method for a heat pump system according to any one of claims 1 to 4, characterized in that, Comprising: Determine that the heat pump system enters the defrosting mode, and obtain the actual outlet water temperature and the target outlet water temperature of the inlet and outlet water pipes; According to the water temperature difference between the actual outlet water temperature and the target outlet water temperature, control and adjust the opening degree of the control valve.

6. The control method of the heat pump system according to claim 5, characterized in that, The step of controlling and adjusting the opening degree of the control valve according to the water temperature difference between the actual outlet water temperature and the target outlet water temperature specifically includes: When the water temperature difference is less than zero, control the control valve to open; When the water temperature difference is greater than zero, the control valve remains in the closed state.

7. The control method of the heat pump system according to claim 6, wherein, When the water temperature difference is less than zero, the step of controlling the control valve to open specifically includes: According to the interval range where the water temperature difference is located, control and adjust the opening degree of the control valve; Wherein, the opening degree of the control valve is negatively correlated with the inlet and outlet water temperature difference.

8. The control method of the heat pump system according to any one of claims 5 to 7, characterized in that, Further comprising: Obtain the phase change temperature of the energy storage layer after complete phase change; Determine that the heat pump system enters the heating mode, and obtain the current energy storage temperature of the energy storage layer; According to the comparison result between the energy storage temperature and the phase change temperature, control and adjust the opening degree of the control valve.

9. The control method of the heat pump system according to claim 8, characterized in that, The step of controlling and adjusting the opening degree of the control valve according to the comparison result between the energy storage temperature and the phase change temperature specifically includes: When the energy storage temperature is greater than the phase change temperature, control the control valve to open; When the energy storage temperature is less than or equal to the phase change temperature, the control valve remains in the closed state.

10. A control device for a heat pump system according to any one of claims 1 to 4, characterized in that, Comprising: An acquisition module, used to determine that the heat pump system enters the defrosting mode, and obtain the actual outlet water temperature and the target outlet water temperature of the inlet and outlet water pipes; A control module, used to control and adjust the opening degree of the control valve according to the water temperature difference between the actual outlet water temperature and the target outlet water temperature.

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