Air source heat pump heat exchange device

Abstract

The present invention relates to the technical field of energy supply equipment, and discloses an air source heat pump heat exchange device, including a first heat exchange component and a second heat exchange component, wherein the first heat exchange component and the second heat exchange component both include a housing, an evaporator, a multi-stage compressor, a condenser, an expansion valve and a phase change material module, wherein the evaporator, the multi-stage compressor, the four-way valve, the condenser and the expansion valve are all installed in the housing, wherein the evaporator absorbs low-temperature heat from the external air through a heat dissipation fan. The phase change material introduced in the present invention can store and release heat, release the stored heat in a low-temperature environment, improve the heating effect, and enhance the system's ability to adapt to extreme environments. At the same time, the introduction of a multi-stage compressor can improve the refrigeration capacity. The multi-stage compressor adjusts the working mode at extremely low temperatures to improve the system's refrigeration capacity, and adjusts the compressor operation mode according to the external temperature, flexibly adjusts the energy consumption, optimizes the system's energy efficiency, and reduces the energy consumption cost.

Description

Technical Field

[0001] The present invention relates to the field of energy supply equipment, and more specifically, to an air source heat pump heat exchange device. Background Art

[0002] The air source heat pump heat exchange device uses the heat energy in the air for air conditioning. It is a highly efficient and energy-saving heating and cooling equipment. Its main components include evaporator, compressor, condenser, expansion valve and control system.

[0003] The evaporator absorbs heat from the outside air and converts it into low-temperature, low-pressure gas. The compressor compresses the low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure gas. The condenser releases heat into the indoor air, converting the high-pressure liquid refrigerant into low-temperature, low-pressure liquid, which is reduced in pressure by the expansion valve and then enters the evaporator cycle.

[0004] In extremely low temperature environments, the heating capacity and cooling efficiency of the air source heat pump heat exchange device decrease. The evaporator of the air source heat pump system absorbs heat from the outside air for heating. In extremely low temperature conditions, the temperature of the outside air is low, resulting in less heat absorbed by the evaporator and a decrease in heating capacity. At the same time, in extremely low temperature environments, the compressor needs to compress the low-temperature and low-pressure refrigerant gas into a high-temperature and high-pressure gas. However, due to the low outside temperature, the compressor's operating efficiency decreases and the cooling efficiency also decreases. Summary of the invention

[0005] The present invention provides an air source heat pump heat exchange device to solve the technical problem in the related art that the common factors of the evaporator and the compressor affect the reduction of heating capacity and cooling efficiency in an extremely low temperature environment.

[0006] The present invention provides an air source heat pump heat exchange device, comprising a first heat exchange component and a second heat exchange component, the first heat exchange component and the second heat exchange component both comprising a box, an evaporator, a multi-stage compressor, a condenser, an expansion valve, a phase change material module and a control system, the evaporator, the multi-stage compressor, the four-way valve, the condenser and the expansion valve are all installed in the box, the control end of the control system is respectively connected to the evaporator, the multi-stage compressor, the condenser and the expansion valve through telecommunications, wherein the evaporator absorbs low-temperature heat from the external air through a heat dissipation fan; wherein one side of the four-way valve is connected to the condenser / evaporator of the indoor unit, and the other side is connected to the evaporator / condenser of the outdoor unit; wherein the multi-stage compressor is connected to the evaporator through a pipeline, the multi-stage compressor receives the low-temperature and low-pressure refrigerant gas from the evaporator, and compresses the refrigerant gas into a high-temperature and high-pressure gas; wherein the condenser is installed on the inner side wall of the box away from the evaporator, the expansion valve is installed on the pipeline of the high-pressure liquid refrigerant connected to the condenser, and the expansion valve causes the high-pressure liquid refrigerant to quickly reduce the pressure when passing through, and become a low-temperature and low-pressure liquid;

[0007] A heat storage tank is connected between the phase change material module and the evaporator. The phase change material module includes a phase change material container, a heat transfer pipe and a liquid pump. The phase change material container and the heat exchanger are connected to the heat storage tank through the heat transfer pipe. The liquid pump is installed in the phase change material container.

[0008] The phase change material container includes two groups of insulation cabinets, an adjustment component is vertically inserted between the two groups of insulation cabinets, and a number of energy storage cabinets are connected in parallel and sliding manner inside the insulation cabinets. The energy storage cabinet includes a cabinet body, an adsorption electromagnet, a first combining rod and a second combining rod. The rod end of the second combining rod is a hollow structure, and the rod end of the first combining rod is a pointed end. The cabinet body is filled with phase change particles. When the adsorption electromagnets on the energy storage cabinets on both sides are adsorbed by the adjustment electromagnets, the first combining rods / second combining rods and the second combining rods / first combining rods of the energy storage cabinets on both sides are inserted into each other to realize heat exchange of the phase change particles in the two energy storage cabinets.

[0009] Furthermore, the phase change particles are composed of molten salt phase change materials, and the molten salt phase change materials include single-component, double-component or multi-component mixtures of fluorides, chlorides, nitrates and carbonates of alkali metals.

[0010] Furthermore, a circulating heat exchange pipeline is arranged at the bottom side of the energy storage cabinet to perform heat exchange on the phase change particles in the energy storage cabinet.

[0011] Furthermore, a heat exchange box is provided at the bottom end of the thermal insulation cabinet, and a circulating heat exchange pipe is provided in the heat exchange box for rapid heat exchange of the heat stored in the phase change material.

[0012] Further, the multi-stage compressor includes two or more compression stage compressors, each compression stage compressor performing a different degree of compression on the refrigerant.

[0013] Furthermore, the adjustment component includes a partition, an adjustment electromagnet and a plate body, and the partition and the electromagnet are arranged in parallel and staggered on the outer walls of both sides of the plate body.

[0014] Furthermore, the first-stage compressor in the multi-stage compressor compresses the low-temperature and low-pressure gas into medium-temperature and medium-pressure gas, and passes it to the second-stage compressor. The second-stage compressor further compresses the medium-temperature and medium-pressure gas into high-temperature and high-pressure gas.

[0015] Furthermore, the control system is used to monitor the operation of the entire air source heat pump device and adjust the working conditions of the evaporator, multi-stage compressor, condenser and expansion valve.

[0016] Furthermore, the thermal energy storage tank and the heat exchanger are connected via a pipeline, and the thermal energy storage tank transfers and exchanges heat via the heat exchanger.

[0017] Furthermore, the phase change material module also includes a temperature sensor, and the temperature sensor is connected to the control system.

[0018] The beneficial effects of the present invention are:

[0019] The phase change material introduced in the present invention can store and release heat, release the stored heat in a low-temperature environment, improve the heating effect, and enhance the system's ability to adapt to extreme environments. At the same time, the introduction of a multi-stage compressor can improve the refrigeration capacity. The multi-stage compressor adjusts the working mode at extremely low temperatures to improve the system's refrigeration capacity, and adjusts the compressor operating mode according to the external temperature, flexibly adjusts energy consumption, optimizes system energy efficiency, and reduces energy consumption costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an air source heat pump heat exchange device proposed by the present invention;

[0021] Figure 2 The present invention Figure 1 A top view of

[0022] Figure 3 The present invention Figure 1 A schematic diagram of the structure of a phase change material container;

[0023] Figure 4 The present invention Figure 4 Schematic diagram of the structure of the energy storage cabinet;

[0024] Figure 5 The present invention Figure 1 The structural diagram of the middle regulating component;

[0025] Figure 6 The present invention Figure 1 A schematic structural diagram of the first heat exchange component;

[0026] Figure 7 The present invention Figure 6 A schematic diagram of the structure from another perspective.

[0027] In the figure: 100, first heat exchange component; 110, multi-stage compressor; 120, four-way valve; 130, thermal energy storage tank; 140, circulating water pipeline; 150, expansion valve; 160, evaporator; 170, cooling fan; 180, box; 190, condenser; 200, second heat exchange component; 300, phase change material container; 310, insulation cabinet; 320, heat exchange box; 400, adjustment component; 410, plate; 420, partition; 430, adjustment electromagnet; 440, temperature sensor; 500, energy storage cabinet; 510, cabinet; 520, adsorption electromagnet; 530, first combining rod; 540, second combining rod; 600, phase change particles; 700, external circulation pipeline. DETAILED DESCRIPTION

[0028] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0029] See also Figure 1-Figure 7 As shown, an air source heat pump heat exchange device includes at least two sets of heat exchange components, such as Figure 1 As shown, it includes a first heat exchange component 100 and a second heat exchange component 200. The first heat exchange component 100 and the second heat exchange component 200 both include a box 180, an evaporator 160, a multi-stage compressor 110, a four-way valve 120, a condenser 190, an expansion valve 150 and a control system. The evaporator 160, the multi-stage compressor 110, the condenser 190 and the expansion valve 150 are all installed in the box 180. The control end of the control system is connected to the evaporator 160, the multi-stage compressor 110, the condenser 190 and the expansion valve 150 respectively through telecommunications. The evaporator 160 is installed on the inner wall of the box 180 and absorbs low-temperature heat from the external air through the heat dissipation fan 170. The evaporator 160 absorbs heat from the external air through the refrigerant flowing in the evaporator 160 and turns it into a low-temperature and low-pressure gas.

[0030] It should be noted that a circulating water pipe 140 is provided at the ends of the two sets of heat exchange components. One side of the circulating water pipe 140 is connected to the indoor unit or heat exchanger of the heat pump system, and the other side is connected to the outdoor unit or cooler, so as to ensure that heat can be effectively transferred and circulated between indoor and outdoor, thereby realizing the heat energy exchange and transfer function of the system;

[0031] It should be noted that the external circulation pipe 700 is usually installed between the indoor unit and the outdoor unit of the air source heat pump system to circulate and transfer the refrigerant or circulating water. Specifically, the external circulation pipe 700 connects the key components inside the heat pump system to ensure that the refrigerant or circulating water can flow effectively and complete the heat exchange process. The layout of the external circulation pipe 700 is related to the specific system design and layout, and is usually installed between the following components:

[0032] The external circulation pipe 700 connects the indoor unit and the outdoor unit. The external circulation pipe 700 can connect the indoor unit and the outdoor unit of the heat pump system and is responsible for transferring refrigerant or circulating water to achieve the circulation and transfer of heat.

[0033] One side of the four-way valve 120 is connected to the condenser 190 / evaporator 160 of the indoor unit, and the other side is connected to the evaporator 160 / condenser 190 of the outdoor unit, which helps to adjust the working state of the heat pump system and ensure the smooth switching and operation of the system between the cooling and heating modes;

[0034] The multi-stage compressor 110 is connected to the evaporator 160 through a pipeline. The multi-stage compressor 110 receives low-temperature and low-pressure refrigerant gas from the evaporator 160 and compresses the refrigerant gas into high-temperature and high-pressure gas to increase its temperature and pressure.

[0035] It should be noted that the multi-stage compressor 110 includes two or more compression stages, and each stage performs a different degree of compression on the refrigerant.

[0036] In one embodiment of the present invention, the first-stage compressor compresses the low-temperature and low-pressure gas into medium-temperature and medium-pressure gas, and passes it to the second-stage compressor. The second-stage compressor further compresses the medium-temperature and medium-pressure gas into high-temperature and high-pressure gas, thereby increasing the temperature and pressure of the gas to meet the needs of the heat exchange operation.

[0037] Under extreme temperature conditions, the multi-stage compressor 110 can adjust the operating mode of each level of the multi-stage compressor 110 according to the external temperature requirements, improve the flexibility and adaptability of the system, monitor the changes in the external ambient temperature through the control system, adjust the operating parameters of the multi-stage compressor 110 of different levels in real time, and optimize the compression process of the refrigerant.

[0038] The multi-stage compressor 110 can adjust the load of the multi-stage compressor 110 as needed. Under different temperature conditions, only the necessary level of the multi-stage compressor 110 is started, saving energy consumption and improving energy utilization efficiency. Through multi-stage compression, the system can more effectively provide the required refrigeration capacity in extreme temperature environments and reduce the energy consumption of the system when it is running under high load;

[0039] The condenser 190 is installed on the inner wall of the box body 180 away from the evaporator 160. The input end of the condenser 190 receives the high-temperature and high-pressure refrigerant gas from the multi-stage compressor 110. At the same time, when passing through the condenser 190, the heat is released into the indoor air, so that the refrigerant becomes a high-pressure liquid. The high-pressure liquid is output through the pipeline at the output end of the condenser 190. At the same time, an expansion valve 150 is installed on the pipeline of the high-pressure liquid refrigerant. The expansion valve 150 can quickly reduce the pressure of the high-pressure liquid refrigerant when passing through, and turn it into a low-temperature and low-pressure liquid, so as to prepare for the refrigerant to enter the evaporator 160 again.

[0040] The control system is used to monitor the operation of the entire air source heat pump device, and adjust the working conditions of the evaporator 160, the multi-stage compressor 110, the condenser 190 and the expansion valve 150 to maintain the optimal operating efficiency and stability of the system.

[0041] The thermal energy storage tank 130 is connected to the heat exchanger through a pipeline. The thermal energy storage tank 130 transfers and exchanges heat with other components through the heat exchanger to achieve the storage or release of thermal energy. Through the heat exchanger, thermal energy can be stored or released from the thermal energy storage tank 130 to meet the system's needs of storing heat at night and releasing heat during the day. Such a design can effectively regulate the flow of thermal energy in the system, achieve more efficient heat management and utilization, and store heat. At night, thermal energy is obtained from the outside through the system and stored in the thermal energy storage tank 130.

[0042] The phase change material module is connected to the evaporator 160 and the thermal energy storage tank 130, and uses the phase change material to store heat and release the heat when needed.

[0043] The phase change material module includes a phase change material container 300, a heat transfer pipe and a liquid pump. The phase change material container 300 and the heat exchanger are connected to the thermal energy storage tank through the heat transfer pipe. The liquid pump is installed in the phase change material container 300 to promote the circulation of heat in the phase change material.

[0044] The phase change material container 300 is vertically inserted with an adjustment component 400, the adjustment component 400 includes a partition 420, an adjustment electromagnet 430 and a plate body 410, and the partition 420 and the electromagnet are parallelly and staggeredly arranged on both side outer walls of the plate body 410;

[0045] The phase change material container 300 includes a heat preservation cabinet 310, and a plurality of energy storage cabinets 500 are connected in parallel and sliding manner inside the heat preservation cabinet 310. The phase change material container 300 is usually made of metal or plastic. The energy storage cabinet 500 is filled with phase change particles 600. The phase change particles 600 are composed of molten salt phase change materials. Molten salt phase change materials include but are not limited to fluorides, chlorides, nitrates, carbonates, etc. of alkali metals, and can be a single-component, two-component or multi-component mixture; they are generally used in medium and high temperature fields, 120 to 1000°C and above.

[0046] A heat exchange box 320 is also provided at the bottom of the insulation cabinet 310. A circulating heat exchange pipe is provided in the heat exchange box 320 for quickly exchanging the heat stored in the phase change material. Specifically, the circulating heat exchange pipe is provided at the bottom side of the cabinet body 510 of the energy storage cabinet 500 for exchanging heat with the phase change particles 600 in the energy storage cabinet 500.

[0047] The phase change material container 300 includes two sets of energy storage cabinets 500, and both sets of energy storage cabinets 500 include a cabinet body 510, an adsorption electromagnet 520, a first combining rod 530 and a second combining rod 540, wherein the rod end of the second combining rod 540 is a hollow structure, and the rod end of the first combining rod 530 is a pointed end;

[0048] At high temperature, the adsorption electromagnets 520 on the energy storage cabinets 500 on both sides are adsorbed by adjusting the electromagnets 430, so that the energy storage cabinets 500 on both sides are close to each other and combined, that is, the first combining rods 530 / second combining rods 540 and the second combining rods 540 / first combining rods 530 of the energy storage cabinets 500 on both sides are inserted into each other, so that the heat exchange of the phase change particles 600 in the two energy storage cabinets 500 is realized;

[0049] After absorbing and storing heat, the phase change material in this operating temperature range is sufficient to provide thermal power for other equipment or applications. It can be used in small power stations, solar power generation, industrial waste heat recovery, etc.

[0050] In one embodiment of the present invention, the phase change material module further includes a temperature sensor 440, which is used to monitor the temperature change of the phase change material and is connected to the control system to provide temperature data to adjust the system operation mode.

[0051] The heat exchanger connects the thermal energy storage tank 130 and other components of the system. When heat needs to be released, the heat is transferred and released through the heat exchanger.

[0052] The control system is optimized to achieve intelligent regulation and control of heat storage at night and heat release during the day.

[0053] The working process of this heat exchange device is as follows:

[0054] 1. Heating mode: At night, the evaporator 160 absorbs heat from the outdoor air, and the refrigerant evaporates into a low-temperature, low-pressure gas; the multi-stage compressor 110 compresses the gas to increase the temperature and pressure; the condenser 190 releases heat to the indoor air, turning the refrigerant into a high-pressure liquid; the expansion valve 150 reduces the pressure, and the refrigerant returns to a low-temperature, low-pressure state and re-enters the evaporator 160 for circulation;

[0055] 2. Cooling mode: The process of the heating mode is reversed, that is, the evaporator 160 absorbs indoor heat, the refrigerant evaporates, and goes through a compression, condensation and expansion cycle;

[0056] 3. Heat storage mode: At night, the first heat exchange component 100 and the second heat exchange component 200 use the waste heat generated by the external air and the system operation to transfer the heat to the thermal energy storage tank 130 and the phase change material module.

[0057] The storage process is to store excess heat energy from the first heat exchange component 100 and the second heat exchange component 200, mainly by controlling the combination of the energy storage cabinets 500 on both sides, that is, the adsorption electromagnet 520 is adsorbed by adjusting the electromagnet 430, so that the energy storage cabinets 500 on both sides are close to each other and combined, that is, the first combining rod 530 / the second combining rod 540 and the second combining rod 540 / the first combining rod 530 of the energy storage cabinets 500 on both sides are inserted into each other, so that the heat exchange of the phase change particles 600 in the two energy storage cabinets 500 is realized. At the same time, the energy storage cabinets 500 repel each other through the adsorption electromagnet 520 and the adjustment electromagnet 430, and the energy storage cabinets 500 are distributed in a stepped state, so that the water cooling and air cooling of the phase change particles 600 are realized, thereby improving the efficiency.

[0058] The phase change material in the phase change material module stores heat, and the heat is transferred to the phase change material to achieve heat storage.

[0059] 4. Heat release mode: During the day, the first heat exchange component 100 and the second heat exchange component 200 release heat according to demand control: heat energy is released from the thermal energy storage tank 130 and the phase change material module, and the heat is transferred to the air source heat pump system through the heat exchanger.

[0060] The system achieves intelligent adjustment through control system optimization to ensure the best heating effect.

[0061] Through the above technical solutions, the air source heat pump system can efficiently utilize the heat in the external air, operate effectively in heating and cooling modes, and realize the transfer and utilization of heat through fluid circulation and heat transfer process. The control system monitors and adjusts the entire process to ensure that the system works at the best efficiency.

[0062] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. An air source heat pump heat exchange device, characterized in that: The invention comprises a first heat exchange component (100) and a second heat exchange component (200), wherein the first heat exchange component (100) and the second heat exchange component (200) both comprise a housing (180), an evaporator (160), a multi-stage compressor (110), a condenser (190), an expansion valve (150) and a phase change material module, wherein the evaporator (160), the multi-stage compressor (110), the four-way valve (120), the condenser (190) and the expansion valve (150) are all installed in the housing (180), wherein the evaporator (160) absorbs low-temperature heat from external air through a heat dissipation fan (170); wherein the four-way valve (120) 0) one side is connected to the condenser (190) / evaporator (160) of the indoor unit, and the other side is connected to the evaporator (160) / condenser (190) of the outdoor unit; wherein the multi-stage compressor (110) is connected to the evaporator (160) via a pipeline, and the multi-stage compressor (110) receives low-temperature and low-pressure refrigerant gas from the evaporator (160) and compresses the refrigerant gas into high-temperature and high-pressure gas; wherein the condenser (190) is installed on the inner side wall of the box body (180) away from the evaporator (160), and the expansion valve (150) is installed on the pipeline of the high-pressure liquid refrigerant connected to the condenser; A thermal energy storage tank (130) is connected between the phase change material module and the evaporator (160); the phase change material module comprises a phase change material container (300), a heat transfer pipe and a liquid pump; the phase change material container (300) and the heat exchanger are connected to the thermal energy storage tank via the heat transfer pipe; and the liquid pump is installed in the phase change material container (300); The phase change material container (300) comprises two groups of heat preservation cabinets (310), an adjustment assembly (400) is vertically inserted between the two groups of heat preservation cabinets (310), a plurality of energy storage cabinets (500) are parallelly slidably connected inside the heat preservation cabinets (310), the energy storage cabinets (500) comprising a cabinet body (510), an adsorption electromagnet (520), a first combining rod (530) and a second combining rod (540), the rod end of the second combining rod (540) being a hollow structure, and the first combining rod ( The rod end of the energy storage cabinet (530) is a pointed tip, and the cabinet body (510) is filled with phase change particles (600). When the adsorption electromagnets (520) on the energy storage cabinets (500) on both sides are adsorbed by adjusting the electromagnets (430), the first combination rods (530) / second combination rods (540) and the second combination rods (540) / first combination rods (530) of the energy storage cabinets (500) on both sides are inserted into each other, thereby realizing heat exchange of the phase change particles (600) in the two energy storage cabinets (500); The phase change particles (600) are composed of a molten salt phase change material, wherein the molten salt phase change material includes a single component, a two-component or a multi-component mixture of fluorides, chlorides, nitrates and carbonates of alkali metals; The circulating heat exchange pipeline is arranged on the bottom side of the cabinet body (510) of the energy storage cabinet (500) and is used to perform heat exchange on the phase change particles (600) in the energy storage cabinet (500); A heat exchange box (320) is also provided at the bottom end of the heat preservation cabinet (310), and a circulating heat exchange pipeline is provided in the heat exchange box (320) for quickly exchanging the stored heat of the phase change material; The adjustment component (400) comprises a partition (420), an adjustment electromagnet (430) and a plate body (410); the partition (420) and the electromagnet are arranged in parallel and staggered on the outer walls of both sides of the plate body (410).

2. The air source heat pump heat exchange device according to claim 1, characterized in that: The multi-stage compressor (110) includes two or more compression stage compressors, each compression stage compressor performing a different degree of compression on the refrigerant.

3. The air source heat pump heat exchange device according to claim 2, characterized in that: The first-stage compressor in the multi-stage compressor (110) compresses low-temperature, low-pressure gas into medium-temperature, medium-pressure gas, and transmits the gas to the second-stage compressor. The second-stage compressor further compresses the medium-temperature, medium-pressure gas into high-temperature, high-pressure gas.

4. The air source heat pump heat exchange device according to claim 3, characterized in that: The control system is used to monitor the operation of the entire air source heat pump device and adjust the working states of the evaporator (160), the multi-stage compressor (110), the condenser (190) and the expansion valve (150).

5. The air source heat pump heat exchange device according to claim 4, characterized in that: The thermal energy storage tank (130) and the heat exchanger are connected via a pipeline, and the thermal energy storage tank (130) transfers and exchanges heat via the heat exchanger.

6. The air source heat pump heat exchange device according to claim 5, characterized in that: The control end of the control system is connected to the evaporator, the multi-stage compressor, the condenser, and the expansion valve respectively via telecommunication. The phase change material module further comprises a temperature sensor (440), and the temperature sensor (440) is connected to the control system.

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