Integrated air conditioner and heat pump water heater composite system and control method

Abstract

The application discloses a combined system of an integrated air conditioner and heat pump water heater and a control method, and relates to the technical field of air conditioning and hot water supply. The system comprises a compressor, a four-way reversing valve, an indoor heat exchanger, an outdoor heat exchanger, a hot water heat exchanger and a throttling device, and realizes a kitchen refrigeration mode, a hot water supply mode and a cold-heat combined supply mode through flow path switching. The integrated structure integrates the kitchen air conditioning and heat pump hot water functions, the flow path is switched through different mode setting control logic, the refrigeration demand can be met in summer, in the cold-heat combined supply mode, the waste heat is recovered by using the refrigeration waste heat to heat domestic water, in the non-refrigeration season, the system is switched to operate in the high-efficiency heat pump water heater mode to supply hot water. The application utilizes the cold-heat combined supply technology to not only strengthen the refrigeration effect and comfort of the kitchen in the high-temperature and high-humidity environment, but also significantly improve the comprehensive utilization rate of the equipment throughout the year.

Description

Technical Field

[0001] This invention relates to the field of air conditioning and hot water supply technology, and in particular to an integrated air conditioning and heat pump water heater composite system and control method. Background Technology

[0002] As people's living standards improve, the comfort of the kitchen environment is receiving increasing attention, and the demand for kitchen-specific air conditioners is rising year by year. However, kitchen spaces are usually quite small, which places higher demands on the compactness of air conditioning equipment; at the same time, the kitchen generates a large amount of hot and humid air during cooking, resulting in high ambient temperature and humidity, which makes ordinary air conditioners ineffective in cooling during the summer and unable to meet the comfort requirements of the kitchen.

[0003] On the other hand, the use of kitchen air conditioners exhibits a clear seasonality, typically operating during the hot summer months and remaining idle for the rest of the year. The effective operating time is less than two months annually, with the remaining approximately ten months being completely unused, resulting in resource waste. Therefore, improving the overall annual utilization rate of kitchen air conditioners has become a pressing technical problem to be solved in this field.

[0004] Existing technologies already include solutions that combine air conditioning with heat pump water heaters. For example, a heat pump water heater / air conditioner can recover condensation heat in cooling mode to heat domestic water, achieving cascaded energy utilization. However, these technologies are mostly designed for ordinary residential environments and do not fully consider the special conditions of kitchens, such as high temperature and humidity, small space, oil fume environment, and low annual utilization rate of kitchen air conditioners. Although some kitchen waste heat recovery devices can recover cooking waste heat, their functions are limited and they fail to achieve organic integration of cooling and hot water supply.

[0005] Existing technical solutions lack a three-dimensional linkage cooling and heating control logic adapted to kitchen scenarios, and also lack an integrated flow path with three modes suitable for all seasons and integrated ceiling. Traditional equipment relies solely on a single temperature threshold to determine the start and stop of cooling and heating, which cannot adapt to the continuous heat generation during kitchen cooking. This easily leads to waste of cooling and heat, and cannot achieve seamless switching between cooling and heating in summer, cooling only in summer, and pure heat pump hot water in winter throughout the year. There are three inherent technical contradictions: the inability to balance cooling and dehumidification effects with waste heat recovery efficiency, poor temperature control logic adaptability, and seasonal idleness of equipment.

[0006] Therefore, there is a need in this field for an integrated collaborative system that can simultaneously address the aforementioned shortcomings of existing technologies. Summary of the Invention

[0007] The purpose of this invention is to provide an integrated air conditioning and heat pump water heater composite system and control method, aiming to solve or improve at least one of the above-mentioned technical problems.

[0008] To achieve the above objectives, the present invention provides the following solution: An integrated air conditioning and heat pump water heater composite system includes: a compressor, a four-way reversing valve, an outdoor heat exchanger, a water heater, an indoor heat exchanger, a first capillary tube, a second capillary tube, a first valve, a second valve, a third valve, a fourth valve, and a fifth valve. The compressor outlet is connected to a four-way reversing valve, which is also connected to one port of the outdoor heat exchanger, the water heater, and the first valve. Another port of the outdoor heat exchanger is connected to one port of the third valve and one port of the second capillary tube; another port of the third valve is connected to one port of the first capillary tube; and another port of the second capillary tube is connected to one port of the fifth valve. The other port of the water heater is connected to the other port of the first capillary tube; The other port of the first valve is connected to the inlet of the compressor and one port of the second valve, and the second valve is connected to the inlet of the compressor; the other port of the second valve is connected to one port of the indoor heat exchanger; the other port of the indoor heat exchanger is connected to the other port of the fifth valve.

[0009] A control method based on the above system includes: The temperature sensor obtains the indoor temperature of the kitchen, the water temperature in the water heater's storage tank, and the outdoor ambient temperature of the kitchen. Based on multi-dimensional temperature data, determine the current season and switch to the corresponding operating mode.

[0010] Furthermore, based on multi-dimensional temperature data, the current season is determined, and the corresponding operating mode is switched, including: When the outdoor temperature of the kitchen exceeds the summer temperature threshold within a preset time threshold, it is determined to be a summer environment. When the water temperature in the water heater's storage tank is lower than the user-set water temperature threshold, the combined cooling and heating mode is activated. When the outdoor temperature of the kitchen exceeds the summer temperature threshold within a preset time threshold, it is determined to be a summer environment. When the water temperature in the water heater's storage tank meets the user-set water temperature threshold, the summer cooling mode is activated. When the outdoor temperature of the kitchen remains below the winter temperature threshold for an extended period of time, it is determined to be a winter environment. If the water temperature in the water heater's storage tank is also below the user-set water temperature threshold, the winter single-heating mode will be activated.

[0011] Furthermore, the combined cooling and heating mode includes: the four-way reversing valve remains de-energized; the second and fourth valves are fully open; the first, third, and fifth valves are fully closed; the compressor operates in variable frequency mode according to the actual load of the kitchen indoor temperature and the water temperature in the storage tank; the indoor heat exchanger operates at a high frequency; the outdoor heat exchanger stops operating; and the water circulation pump of the water heater continues to operate.

[0012] Furthermore, the summer cooling mode includes: the four-way reversing valve remains energized and reversed; the second valve is fully open; the first and third valves are fully closed; the fourth and fifth valves are naturally open along the flow path; the compressor operates at a variable frequency according to the indoor temperature and humidity load of the kitchen; both the indoor and outdoor heat exchangers operate at high frequency; and the water circulation pump of the water heater stops operating.

[0013] Furthermore, the winter single-heating mode includes the four-way reversing valve being de-energized; the first and third valves being fully open; the second, fourth, and fifth valves being fully closed; the compressor operating at variable frequency according to the water tank temperature load; the outdoor heat exchanger operating at medium frequency; the indoor heat exchanger stopping operation; and the water circulation pump of the water heater operating at medium frequency.

[0014] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects: This invention discloses an integrated air conditioning and heat pump water heater composite system and control method. The system adopts an integrated concealed installation design, saving kitchen space and meeting the needs of modern home decoration, achieving multiple functions in one unit. Through multi-mode intelligent switching, it adapts to the kitchen's year-round cooling and hot water needs, solving the problem of single-function traditional equipment. It recovers the waste heat from refrigeration to produce hot water, eliminating energy waste and significantly improving system energy efficiency. It extends the equipment's operating cycle to the whole year, effectively improving the overall utilization rate. It uses three-dimensional temperature linkage to determine the start and stop of the cooling and heating supply, unaffected by short-term outdoor temperature drops, continuously recovering the waste heat from refrigeration, and simultaneously achieving rapid cooling and dehumidification in the kitchen, increasing the cooling rate. At the same time, it adapts to the special working conditions of high temperature and high humidity in the kitchen, quickly achieving cooling and dehumidification, improving the comfort of the cooking environment, and avoiding long-term high-load operation of the equipment, extending its service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system structure of the present invention; Figure 2 This is a schematic diagram of the combined cooling and heating system in this embodiment; Figure 3 This is a schematic diagram of the summer cooling mode system in this embodiment; Figure 4 This is a schematic diagram of the winter single-heating mode system in this embodiment; Attached reference numerals: 1-Compressor, 2-Four-way reversing valve, 3-Outdoor heat exchanger, 4-Water heater, 5-Indoor heat exchanger, 6-First capillary tube, 7-Second capillary tube, 8-First valve, 9-Second valve, 10-Third valve, 11-Fourth valve, 12-Fifth valve. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] The purpose of this invention is to provide an integrated air conditioning and heat pump water heater composite system and control method, aiming to solve or improve at least one of the above-mentioned technical problems.

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, the present invention provides an integrated air conditioning and heat pump water heater composite system, including: compressor 1, four-way reversing valve 2, outdoor heat exchanger 3, water heater 4, indoor heat exchanger 5, first capillary tube 6, second capillary tube 7, first valve 8, second valve 9, third valve 10, fourth valve 11, and fifth valve 12. The outlet of compressor 1 is connected to four-way reversing valve 2, and four-way reversing valve 2 is connected to one port of outdoor heat exchanger 3, water heater 4 and first valve 8 respectively; Another port of the outdoor heat exchanger 3 is connected to one port of the third valve 10 and the second capillary tube 7 respectively; another port of the third valve 10 is connected to one port of the fourth valve 11 and the first capillary tube 6 respectively; another port of the second capillary tube 7 is connected to one port of the fifth valve 12. The other port of the water heater 4 is connected to the other port of the first capillary tube 6; The other port of the first valve 8 is connected to the inlet of the compressor 1 and one port of the second valve 9, and the second valve 9 is connected to the inlet of the compressor 1; the other port of the second valve 9 is connected to one port of the indoor heat exchanger 5; the other port of the indoor heat exchanger 5 is connected to the other port of the fifth valve 12.

[0021] The components are connected by high-pressure resistant and refrigerant corrosion resistant pipes to form a closed refrigerant circulation loop.

[0022] The aforementioned system is an integrated structure with a standardized overall design that fits the kitchen ceiling installation space. During the construction phase, the water pipes and electrical circuits are pre-installed before the kitchen renovation. The entire equipment is concealed within the ceiling, with no exposed parts, pipes, or valves, meeting the modern home decoration requirements for concealment and integration.

[0023] Among them, the first capillary tube 6 and the second capillary tube 7 serve as throttling devices to throttle and reduce the pressure and temperature of the high-pressure liquid refrigerant, so that the refrigerant can be stably transformed from a high-pressure liquid state to a low-temperature, low-pressure gas-liquid two-phase state suitable for evaporation and heat absorption.

[0024] Among them, the water heater 4 is a heat exchange structure with an integrated water storage tank, which can stably serve as a condenser to realize the condensation and heat release of the refrigerant.

[0025] Among them, the outdoor heat exchanger 3 and the indoor heat exchanger 5 are switchable heat exchange components, which can automatically switch into condensers or evaporators according to the switching of system operation modes, and respectively complete the condensation and heat release or evaporation and heat absorption of refrigerant.

[0026] The above system, through the switching action of the four-way reversing valve 2 and the precise on / off control of each valve, realizes the switching of different flow paths of refrigerant in the circulation loop, adapting to the working conditions of three operating modes: combined cooling and heating in summer, cooling only in summer, and heating water only in winter.

[0027] In one embodiment, a control method based on the above system is provided, comprising: After the system is powered on, it first performs a self-test of each component, pipeline, valve and sensor to confirm that there are no faults.

[0028] Step 1: Obtain the indoor temperature of the kitchen, the water temperature in the water tank of water heater 4, and the outdoor ambient temperature of the kitchen through temperature sensors; Step 2: Determine the current season based on multi-dimensional temperature data and switch to the corresponding operating mode.

[0029] The operating modes include combined cooling and heating mode, summer cooling-only mode, and winter heating-only mode. When the outdoor temperature of the kitchen exceeds the summer temperature threshold (35℃) within a preset time threshold (1 hour), it is judged as a summer environment. When the water temperature in the water heater 4's storage tank is lower than the user-set water temperature threshold, the combined cooling and heating mode is activated. like Figure 2As shown, the combined cooling and heating mode includes: the four-way reversing valve 2 remains de-energized; the second valve 9 and the fourth valve 11 are fully open; the first valve 8, the third valve 10, and the fifth valve 12 are fully closed; the compressor 1 operates in variable frequency mode according to the actual load of the kitchen indoor temperature and the water temperature in the storage tank; the indoor heat exchanger 5 operates at a high frequency; the outdoor heat exchanger 3 stops operating; and the water circulation pump of the water heater 4 continues to operate.

[0030] In the combined cooling and heating mode, the water heater 4 serves as the main condenser of the system, the indoor heat exchanger 5 serves as the only evaporator of the system, the first capillary tube 6 is a dedicated throttling device, and the remaining components work together to achieve a closed-loop circulation of the refrigerant. The specific roles of each component and the changes in the refrigerant state during the circulation process are as follows: When compressor 1 starts, it draws the low-temperature, low-pressure gaseous refrigerant back into the compression chamber and converts it into high-temperature, high-pressure gaseous refrigerant through compression. The refrigerant is then continuously discharged from the refrigerant outlet, providing power for the entire cycle. At this time, compressor 1 adjusts its operating frequency according to the kitchen heat load and hot water load to avoid high-load no-load operation. High-temperature, high-pressure gaseous refrigerant flows into the four-way reversing valve 2. Because the four-way reversing valve 2 is de-energized, the refrigerant flows directly into the water heater 4 along the preset flow path. At this time, the water heater 4 acts as the main condenser of the system, undertaking the core heat dissipation function of the entire system. The refrigerant flows in the heat exchange tube of the water heater 4 and has a full indirect heat exchange with the cold water in the water tank outside the tube, releasing all of its condensation heat into the water in the water tank. After releasing heat, the refrigerant gradually condenses from a high-temperature, high-pressure gaseous state into a high-pressure liquid refrigerant. The water in the water tank continues to heat up after absorbing the condensation heat. The low-speed operation of the water circulation pump ensures that there is no local overheating of the water in the water tank, realizing the real-time and uniform preparation of domestic hot water to meet the daily needs of users. The above process replaces the traditional method of air conditioning that discharges condensation heat outdoors, realizing the recovery of condensation waste heat and eliminating energy waste.

[0031] After the high-pressure liquid refrigerant flows out of the water heater 4, it smoothly enters the first capillary tube 6. The first capillary tube 6 acts as a throttling device, using the local resistance of the narrow-diameter pipe to throttle and reduce the pressure and temperature of the high-pressure liquid refrigerant, so that the pressure and temperature of the refrigerant are rapidly reduced and stably transformed into a low-temperature, low-pressure gas-liquid two-phase refrigerant. The refrigerant in this state has a very strong evaporation and heat absorption capacity, which prepares for subsequent cooling and dehumidification of the kitchen. After the low-temperature, low-pressure gas-liquid two-phase refrigerant flows out from the first capillary tube 6, because the third valve 10 and the fifth valve 12 are in the closed state, the refrigerant has no other flow path to follow and can only flow smoothly to the indoor heat exchanger 5 along the conduction path of the fourth valve 11. The valve cut-off avoids short-circuiting of the refrigerant flow path and ensures that all the refrigerant enters the indoor heat exchange stage. Low-temperature, low-pressure gas-liquid two-phase refrigerant enters the indoor heat exchanger 5. At this time, the indoor heat exchanger 5 acts as the only evaporator in the system. The indoor fan operates at high frequency, forcibly blowing the high-temperature and high-humidity air in the kitchen across the fins of the indoor heat exchanger 5. The refrigerant and the high-temperature and high-humidity air undergo continuous and efficient forced heat exchange, quickly absorbing the sensible and latent heat of the indoor air, achieving rapid cooling and efficient dehumidification of the kitchen. After absorbing heat, the refrigerant completely vaporizes from the low-temperature, low-pressure gas-liquid two-phase into a low-temperature, low-pressure gaseous refrigerant, ensuring that no liquid refrigerant flows back to the compressor 1, avoiding liquid slugging damage. After the completely vaporized low-temperature, low-pressure gaseous refrigerant flows out of the indoor heat exchanger 5, it enters the second valve 9. Since the first valve 8 is closed, the refrigerant can only flow along the conduction path of the second valve 9 to the refrigerant inlet of the compressor 1. Low-temperature, low-pressure gaseous refrigerant is drawn back into the compression chamber through the inlet of compressor 1, completing a continuous, stable, and non-redundant closed-loop refrigerant cycle throughout the summer combined cooling and heating mode.

[0032] When the indoor temperature in the kitchen drops to the user's preset cooling temperature and the water temperature in the water heater 4's storage tank rises to the user's preset hot water temperature, the system's main control module controls the compressor 1 to reduce its operating frequency and enter standby mode, and the indoor fan switches to low-frequency operation; if either the indoor temperature or the water temperature in the tank rises back to the trigger threshold, the equipment immediately resumes normal operation until the user manually shuts it down.

[0033] When the outdoor temperature of the kitchen exceeds the summer temperature threshold (35℃) within a preset time threshold (1 hour), it is judged as a summer environment. When the water temperature in the water heater 4's water tank meets the user-set water temperature threshold, the summer cooling mode is activated. The goal is to precisely cool and dehumidify the indoor air in the kitchen. In response to the special working conditions of high temperature and high humidity in the kitchen, a special flow path design is used to reduce refrigerant flow path redundancy, improve cooling efficiency, avoid long-term high-load operation of the equipment, and at the same time ensure the heat exchange stability in the kitchen's oil fume environment.

[0034] like Figure 3 As shown, the summer cooling mode includes: the four-way reversing valve 2 is kept energized and reversed; the second valve 9 is fully open; the first valve 8 and the third valve 10 are fully closed; the fourth valve 11 and the fifth valve 12 are naturally open along the flow path; the compressor 1 operates at a variable frequency according to the indoor temperature and humidity load of the kitchen; both the indoor heat exchanger 5 and the outdoor heat exchanger 3 operate at high frequency; and the water circulation pump of the water heater 4 stops operating.

[0035] In summer cooling-only mode, outdoor heat exchanger 3 acts as the main condenser, indoor heat exchanger 5 acts as the sole evaporator, and the second capillary tube 7 acts as a throttling device. The remaining components work together to achieve a closed-loop refrigerant circulation. The specific roles of each component and the changes in refrigerant state during the circulation process are as follows: When compressor 1 starts, it draws the low-temperature, low-pressure gaseous refrigerant back into the compression chamber, and converts it into high-temperature, high-pressure gaseous refrigerant through frequency conversion compression. The refrigerant is then continuously discharged from the refrigerant outlet. The operating frequency of compressor 1 is adjusted in real time according to the temperature and humidity of the kitchen room to achieve precise cooling and energy saving. High-temperature and high-pressure gaseous refrigerant flows into the four-way reversing valve 2. Because the four-way reversing valve 2 is energized and reversed, the refrigerant flows directly into the outdoor heat exchanger 3 along the preset flow path. At this time, the outdoor heat exchanger 3 acts as the main condenser of the system and undertakes the core heat dissipation function of the entire system. The outdoor fan runs at high frequency, forcing the outdoor ambient temperature air to pass through the fins of the outdoor heat exchanger 3. The refrigerant and the outdoor air undergo full forced heat exchange, releasing all of its condensation heat to the outdoor environment. After releasing heat, the refrigerant gradually condenses from a high-temperature and high-pressure gaseous state into a high-pressure liquid refrigerant. After the high-pressure liquid refrigerant flows out from the outdoor heat exchanger 3, because the third valve 10 is in the closed state, the refrigerant can only enter the second capillary tube 7 along the conduction path. The second capillary tube 7 is a dedicated throttling device for this mode, which performs precise throttling, pressure reduction and temperature reduction on the high-pressure liquid refrigerant, so that the refrigerant can be quickly transformed into a low-temperature and low-pressure gas-liquid two-phase refrigerant, ensuring that the refrigerant has sufficient evaporation and heat absorption capacity. Low-temperature, low-pressure gas-liquid two-phase refrigerant enters the indoor heat exchanger 5. At this time, the indoor heat exchanger 5 acts as the only evaporator in the system. The indoor fan operates at high frequency, forcibly blowing the high-temperature and high-humidity air in the kitchen across the fins of the indoor heat exchanger 5. Because the fins of the indoor heat exchanger 5 are treated with anti-oil fume treatment, oil fume adhesion is avoided from affecting the heat exchange efficiency. The refrigerant quickly absorbs the sensible heat and latent heat of the indoor air, achieving rapid cooling and deep dehumidification of the kitchen. After absorbing heat, the refrigerant completely vaporizes from the low-temperature, low-pressure gas-liquid two-phase into a low-temperature, low-pressure gaseous refrigerant, preventing the liquid refrigerant from flowing back and causing liquid slugging in the compressor 1. After the completely vaporized low-temperature, low-pressure gaseous refrigerant flows out of the indoor heat exchanger 5, it enters the second valve 9. Since the first valve 8 is closed, the refrigerant can only flow along the conduction path of the second valve 9 to the refrigerant inlet of the compressor 1, ensuring the uniqueness of the refrigerant return flow. Low-temperature, low-pressure gaseous refrigerant is drawn back into the compression chamber through the inlet of compressor 1, completing the closed refrigerant cycle in the entire summer cooling mode. This flow path has no redundancy and the refrigerant heat exchange efficiency is high, solving the technical problems of high cooling load and slow cooling of ordinary air conditioners in the high temperature and high humidity environment of the kitchen.

[0036] When the indoor temperature in the kitchen drops to the user's preset cooling temperature and the relative humidity drops to 50-60%, the system's main control module controls compressor 1 to reduce its operating frequency and enter standby mode, while the indoor and outdoor fans switch to low-frequency operation. If the indoor temperature and humidity rise back to the trigger threshold, the equipment immediately resumes normal operation until the user manually shuts it down.

[0037] When the outdoor temperature of the kitchen remains below the winter temperature threshold (-10℃) for a preset time threshold (1 hour), it is determined to be a winter environment. When the water temperature in the water heater 4's storage tank is lower than the user-set water temperature threshold, the winter single heating mode is activated.

[0038] The goal is to create a high-efficiency heat pump water heater specifically for domestic hot water production. It utilizes the heat pump principle to absorb low-grade heat energy from outdoor air and converts it into high-grade condensing heat for hot water production through the work of the compressor, replacing traditional electric heating and gas heating methods and significantly reducing energy consumption. At the same time, it extends the effective operating cycle of the equipment from two months in summer to the whole year, completely solving the technical problem of high idle rate of kitchen air conditioners throughout the year and improving the overall utilization rate of the equipment.

[0039] like Figure 4 As shown, the winter single-heating mode includes the following: the four-way reversing valve 2 is in the de-energized state; the first valve 8 and the third valve 10 are fully open; the second valve 9, the fourth valve 11, and the fifth valve 12 are fully closed; the compressor 1 operates at a variable frequency according to the water tank temperature load; the outdoor heat exchanger 3 operates at a medium frequency; the indoor heat exchanger 5 stops operating; and the water circulation pump of the water heater 4 operates at a medium frequency.

[0040] In the winter single-heating mode, the water heater 4 acts as the main condenser, the outdoor heat exchanger 3 acts as the sole evaporator, the first capillary tube 6 acts as a throttling device, and the remaining components cooperate to achieve a closed-loop circulation of the refrigerant. The specific roles of each component and the changes in the refrigerant state during the circulation process are as follows: When compressor 1 starts, it draws the low-temperature, low-pressure gaseous refrigerant back into the compression chamber. Through frequency conversion compression, it is converted into high-temperature, high-pressure gaseous refrigerant and continuously discharged from the refrigerant outlet. The operating frequency of compressor 1 is adjusted in real time according to the water temperature in the water tank. The lower the water temperature in the water tank, the higher the operating frequency, ensuring the efficiency of hot water production. High-temperature, high-pressure gaseous refrigerant flows into the four-way reversing valve 2. Because the four-way reversing valve 2 is de-energized, the refrigerant flows directly into the water heater 4 along the reversing flow path. At this time, the water heater 4 acts as the main condenser of the system, undertaking the core heat dissipation function of the entire system. The refrigerant flows in the heat exchange tube of the water heater 4 and has a full indirect heat exchange with the cold water in the water tank outside the tube, releasing all of its high-grade condensation heat into the water in the water tank. After releasing heat, the refrigerant gradually condenses from a high-temperature, high-pressure gaseous state into a high-pressure liquid refrigerant. The water circulation pump of the water heater 4 operates at medium frequency to ensure that the water in the water tank is heated quickly and evenly, achieving efficient preparation of domestic hot water. The hot water production efficiency is also much higher than that of traditional electric water heaters. After the high-pressure liquid refrigerant flows out of the water heater 4, it enters the throttling device. The throttling device performs precise pressure reduction and temperature reduction on the high-pressure liquid refrigerant, so that the refrigerant is stably transformed into a low-temperature, low-pressure gas-liquid two-phase refrigerant. The refrigerant in this state has a strong ability to absorb heat in low-temperature environments and can effectively absorb heat energy in low-temperature outdoor environments in winter. After the low-temperature, low-pressure gas-liquid two-phase refrigerant flows out of the throttling device, because the fourth valve 11 and the fifth valve 12 are in the closed state, the refrigerant can only flow smoothly to the outdoor heat exchanger 3 along the conduction path of the third valve 10. The precise cut-off of the closed valves avoids short circuit of the refrigerant flow path and ensures that all the refrigerant enters the outdoor heat absorption stage. Low-temperature, low-pressure gas-liquid two-phase refrigerant enters the outdoor heat exchanger 3. At this time, the outdoor heat exchanger 3 acts as the only evaporator in the system. The outdoor fan operates at medium frequency, forcibly transferring the low-grade heat energy in the outdoor air to the fins of the outdoor heat exchanger 3. The refrigerant and the fins undergo sufficient heat exchange, quickly absorbing the low-grade heat energy from the outside, thus realizing the recovery and utilization of heat energy. After absorbing heat, the refrigerant completely vaporizes from the low-temperature, low-pressure gas-liquid two-phase into a low-temperature, low-pressure gaseous refrigerant, ensuring that no liquid refrigerant flows back to the compressor 1. After the completely vaporized low-temperature, low-pressure gaseous refrigerant flows out of the outdoor heat exchanger 3, it flows back into the four-way reversing valve 2 and flows to the valve group along the flow path after the energized reversal. Because the second valve 9 is in the closed state, the refrigerant can only flow to the refrigerant inlet of the compressor 1 along the conduction path of the first valve 8. Low-temperature, low-pressure gaseous refrigerant is drawn back into the compression chamber through the inlet of compressor 1, completing a highly efficient and energy-saving closed-loop refrigerant cycle in the single-heating water mode throughout winter. This process consumes only a small amount of electrical energy to drive compressor 1, which can absorb a large amount of low-grade heat energy from the outdoor air to achieve efficient preparation of domestic hot water and significantly reduce the energy consumption of hot water preparation.

[0041] When the water temperature in the water heater 4 storage tank rises to the user's preset hot water temperature, the system's main control module controls the compressor 1 to reduce its operating frequency and enter standby mode. The outdoor fan and water circulation pump stop running, and the water tank enters the heat preservation state. If the water temperature in the tank drops below 45℃, the equipment immediately resumes normal operation until the user manually shuts it down.

[0042] The three-dimensional linkage heating and cooling control system for kitchens disclosed in this invention is the core and original control logic of this invention. Unlike the single-parameter determination mode of existing patents, it determines the start and stop by linkage of three-dimensional data of outdoor ambient temperature, indoor kitchen temperature and water tank temperature. It can match the special working conditions of continuous heat generation in the kitchen. Combined with the all-season three-mode architecture of the integrated ceiling, it can achieve precise operation in different scenarios throughout the year. This control logic is deeply integrated with the all-season heating and cooling system.

[0043] During system operation, compressor 1 has overpressure, overcurrent, overheat, and liquid slugging protection functions; heat exchanger has antifreeze, anti-scaling, and anti-oil fume blockage protection functions; valve group has anti-misoperation and airtightness protection functions; when the outdoor ambient temperature is lower than the heat pump's limit operating temperature, the system automatically stops operating to avoid equipment damage.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0045] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An integrated air conditioning and heat pump water heater composite system, characterized in that, include: Compressor (1), four-way reversing valve (2), outdoor heat exchanger (3), water heater (4), indoor heat exchanger (5), first capillary tube (6), second capillary tube (7), first valve (8), second valve (9), third valve (10), fourth valve (11), fifth valve (12); The outlet of the compressor (1) is connected to a four-way reversing valve (2), and the four-way reversing valve (2) is connected to one port of the outdoor heat exchanger (3), the water heater (4) and the first valve (8); The other port of the outdoor heat exchanger (3) is connected to one port of the third valve (10) and the second capillary tube (7); the other port of the third valve (10) is connected to one port of the fourth valve (11) and the first capillary tube (6); the other port of the second capillary tube (7) is connected to one port of the fifth valve (12); The other port of the water heater (4) is connected to the other port of the first capillary tube (6); The other port of the first valve (8) is connected to the inlet of the compressor (1) and one port of the second valve (9), and the second valve (9) is connected to the inlet of the compressor (1); the other port of the second valve (9) is connected to one port of the indoor heat exchanger (5); the other port of the indoor heat exchanger (5) is connected to the other port of the fifth valve (12).

2. A control method based on the system of claim 1, characterized in that, include: The indoor temperature of the kitchen, the water temperature in the water tank of the water heater (4), and the outdoor temperature of the kitchen are obtained by temperature sensors. Based on multi-dimensional temperature data, determine the current season and switch to the corresponding operating mode.

3. The control method according to claim 2, characterized in that, The step of determining the current season based on multidimensional temperature data and switching to the corresponding operating mode includes: When the outdoor temperature of the kitchen exceeds the summer temperature threshold within the preset time threshold, it is judged as a summer environment, and when the water temperature in the water tank of the water heater (4) is less than the water temperature threshold set by the user, the combined cooling and heating mode is activated. When the outdoor temperature of the kitchen exceeds the summer temperature threshold within the preset time threshold, it is judged as a summer environment, and when the water temperature of the water heater (4) meets the water temperature threshold set by the user, the summer single cooling mode is activated. When the outdoor temperature of the kitchen is consistently lower than the winter temperature threshold within a preset time threshold, it is determined to be a winter environment. When the water temperature in the water tank of the water heater (4) is lower than the water temperature threshold set by the user, the winter single heating mode is activated.

4. The control method according to claim 3, characterized in that, The combined cooling and heating mode includes: the four-way reversing valve (2) is kept off; the second valve (9) and the fourth valve (11) are fully open; the first valve (8), the third valve (10), and the fifth valve (12) are fully closed; the compressor (1) is adapted to the actual load of the kitchen indoor temperature and the water temperature of the water tank in the variable frequency mode; the indoor heat exchanger (5) is operated at a high frequency; the outdoor heat exchanger (3) is stopped; and the water circulation pump of the water heater (4) is continuously running.

5. The control method according to claim 3, characterized in that, The summer cooling mode includes: the four-way reversing valve (2) is kept in the energized reversing state; the second valve (9) is fully open; the first valve (8) and the third valve (10) are fully closed; the fourth valve (11) and the fifth valve (12) are naturally open along the flow path; the compressor (1) operates at a variable frequency according to the indoor temperature and humidity load of the kitchen; the indoor heat exchanger (5) and the outdoor heat exchanger (3) both operate at high frequency; and the water circulation pump of the water heater (4) stops operating.

6. The control method according to claim 3, characterized in that, The winter single-heat mode includes the four-way reversing valve (2) being in a de-energized state; the first valve (8) and the third valve (10) being fully open; the second valve (9), the fourth valve (11), and the fifth valve (12) being fully closed; the compressor (1) operating at variable frequency according to the water tank temperature load; the outdoor heat exchanger (3) operating at medium frequency; the indoor heat exchanger (5) being stopped; and the water circulation pump of the water heater (4) operating at medium frequency.

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