Air conditioner heat pump application all-in-one machine temperature control system and control method

Abstract

The invention discloses an air conditioner heat pump application all-in-one machine temperature control system and control method.The system comprises a refrigerant circulation loop, a first temperature hot water pipeline, a second temperature hot water pipeline and a cold water loop, and a first heat exchanger and a second heat exchanger are arranged on one side of the hot end of the refrigerant circulation loop; a third heat exchanger is arranged on the side close to the cold end of the refrigerant circulation loop, gradient heat in the refrigerant is heated into water through the first heat exchanger and the second heat exchanger, and the gradient heat is stored in the first heat preservation water tank and the second heat preservation water tank for life use of people. And the cold water loop exchanges heat with the third heat exchanger, a refrigeration fan coil and a circulating pump are arranged on the cold water loop, and a fan coil fan is arranged on one side of the refrigeration fan coil and assists in blowing out cold air. And the heat exchange temperatures of the heat exchangers are controlled by the temperature controller in the system, so that clean water with different temperature gradients is generated while the refrigeration efficiency of the air conditioner is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of application of an air-conditioning heat pump integrated machine, and in particular relates to a temperature control system and a control method for an air-conditioning heat pump integrated machine. Background Art

[0002] Air conditioning and heat pump applications both use the refrigerant Carnot cycle to achieve the purpose of cooling the room temperature for air conditioning, or use the Carnot cycle to use the refrigerant to absorb heat in the air to raise the temperature for heating or preparing hot water.

[0003] When the air energy water heater of the traditional heat pump absorbs the heat of the air and heats the water to a certain temperature, it will automatically shut down due to the thermal protection of the refrigeration system, so this structure is not suitable for use as an air conditioner. When the refrigeration system is used as an air conditioner, in order to ensure the refrigeration efficiency, the structural design must ensure that the refrigerant has a lower return air temperature through the evaporative heat exchanger during system operation.

[0004] In the Carnot cycle, the temperature of the refrigerant after being compressed by the refrigeration compressor is increased. Before the refrigerant circulates through the throttle valve, the high-temperature refrigerant must be dissipated through the heat exchanger. It is necessary to optimize resource utilization by utilizing the heat at this stage. The heat dissipation at this stage ensures that the system has a higher cooling efficiency as an air conditioner.

[0005] Therefore, how to provide an air conditioning heat pump integrated temperature control system and control method is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides a temperature control system and control method for an air-conditioning heat pump all-in-one machine, which changes the air-conditioning heat pump all-in-one machine from traditional air cooling to water cooling, and uses a thermostat to control the heat exchange temperatures of multiple heat exchangers in the system, thereby achieving clean water with different temperature gradients for use in life while ensuring the air-conditioning refrigeration efficiency.

[0007] In order to achieve the above object, the present invention adopts the following technical solution: an air conditioning heat pump integrated machine temperature control system, comprising:

[0008] A refrigerant circulation loop, a first heat exchanger is arranged on a side close to a hot end of the refrigerant circulation loop, a second heat exchanger is arranged on the refrigerant circulation loop and downstream of the first heat exchanger, and a third heat exchanger is arranged on a side close to a cold end of the refrigerant circulation loop;

[0009] A first temperature hot water pipeline, the first temperature hot water pipeline exchanges heat with a first heat exchanger, a first solenoid valve and a first insulation water tank are arranged on the first temperature hot water pipeline, and a first thermostat for controlling the first solenoid valve is arranged on the refrigerant circulation circuit close to the first heat exchanger;

[0010] A second temperature hot water pipeline, the second temperature hot water pipeline exchanges heat with a second heat exchanger, the second temperature hot water pipeline is arranged with a second solenoid valve and a second thermal insulation water tank, a second thermostat for controlling the second solenoid valve is arranged on a refrigerant circulation circuit close to the second heat exchanger, the first temperature hot water pipeline and the second temperature hot water pipeline are connected to an external water source through a one-way valve, and the water temperature in the first thermal insulation water tank is higher than the water temperature in the second thermal insulation water tank;

[0011] A cold water circuit, wherein the cold water circuit exchanges heat with the third heat exchanger, a refrigeration fan coil and a circulation pump are arranged on the cold water circuit, and a fan coil fan is arranged on one side of the refrigeration fan coil to assist in blowing out cold air.

[0012] The beneficial effects of the present invention are as follows: a high-temperature and high-pressure liquid medium flows out from the hot end of the refrigerant circulation loop, and is cooled after heat exchange through the first heat exchanger and the second heat exchanger. The heat in this process is stored in the first insulated water tank and the second insulated water tank in a step-by-step manner. Depending on the different purposes of domestic water use, the hot water in the first insulated water tank and the second insulated water tank can be used in a targeted manner. This stage is the use of the water heater. It should be noted that the purpose of the staged use of the first heat exchanger and the second heat exchanger for heat exchange is to reduce the refrigerant return air temperature for the convenience of the application of the air-conditioning system. The cold water circuit uses the third heat exchanger to exchange heat with the refrigerant at a lower temperature. The generated low-temperature cold water cooperates with the refrigeration fan coil and the fan of the fan coil to blow out cold air to achieve the purpose of air conditioning refrigeration. The present invention intercepts the refrigerant heat of different temperature gradients through the first heat exchanger and the second heat exchanger to heat water to ensure that the refrigerant has a lower temperature before passing through the throttle valve of the refrigerant circulation loop during the cycle, thereby ensuring that the system has a higher refrigeration efficiency as an air conditioner.

[0013] Preferably, a refrigeration compressor, a gas-liquid separation tank and a throttling expansion valve are arranged on the refrigerant circulation loop, the gas-liquid separation tank is connected to the inlet end of the refrigeration compressor, the refrigeration compressor is connected to the throttling expansion valve through a pipeline, the throttling expansion valve is connected to the gas-liquid separation tank through a pipeline, the first heat exchanger and the second heat exchanger are arranged on the pipeline between the refrigeration compressor and the throttling expansion valve, and the third heat exchanger is arranged on the pipeline between the throttling expansion valve and the gas-liquid separation tank.

[0014] The resulting technical effect is: the refrigeration compressor, gas-liquid separation tank, and throttling expansion valve are necessary conditions for the refrigerant circulation system. The end where the refrigerant flows out of the compressor is the hot end, and the end where the refrigerant enters the compressor is the cold end. The heat of the refrigerant is needed to heat the water near the hot end, and the side can also better reduce the refrigerant return temperature. The refrigerant at the cold end absorbs heat in the third heat exchanger, thereby providing a heat exchange basis for air conditioning refrigeration.

[0015] Preferably, there are multiple groups of the first heat exchanger and the second heat exchanger, and multiple groups of the first heat exchangers are arranged in parallel on the refrigerant circulation loop to realize primary multi-point heat exchange, and multiple groups of the second heat exchangers are arranged in parallel on the refrigerant circulation loop to realize secondary multi-point heat exchange.

[0016] The resulting technical effect is: in specific implementation, the first heat exchanger and the second heat exchanger can be arranged in parallel in multiple groups, so as to make full use of the heat, and the refrigerant can achieve multi-point heat dissipation to reduce the temperature, while achieving multi-point heating of the water to provide hot water. The heated water has different uses according to different life needs.

[0017] Preferably, the water inlet ends of the first temperature hot water pipeline and the second temperature hot water pipeline are both connected to the water supply branch, the water inlet sides of the first insulated water tank and the second insulated water tank are both connected to solenoid valves, the first insulated water tank and the second insulated water tank are respectively connected to bypass pipelines on one side close to the corresponding solenoid valve, the two bypass pipelines are connected in parallel and return to the water supply branch after passing through the atomizing spray cooling water tank, a two-position three-way valve is arranged before the bypass pipeline enters the atomizing spray cooling water tank, a water pump is provided on the water outlet pipeline after passing through the atomizing spray cooling water tank, water level sensors are provided in the first insulated water tank and the second insulated water tank, and the solenoid valve, water level sensor, two-position three-way valve and water pump are respectively connected to the CPU control end by electrical signals.

[0018] The resulting technical effect is that the water inlet to the first temperature hot water pipeline and the second temperature hot water pipeline are both external cold water, so that there is a temperature difference when passing through the heat exchanger to achieve heat exchange. When the heated water fills up the first insulated water tank and the second insulated water tank respectively, the solenoid valve is closed to stop the water storage state. At this time, the bypass pipeline starts the circulation, and the water passing through the first heat exchanger and the second heat exchanger enters the atomizing spray cooling water tank for heat exchange. The water with reduced temperature continues to flow back to the first heat exchanger and the second heat exchanger, thereby continuing to achieve the heat exchange and cooling effect on the refrigerant.

[0019] Preferably, the bypass pipeline, the water pump and the atomizing spray cooling water tank form a bypass heat dissipation pipeline.

[0020] The resulting technical effect is: It should be noted that when the first insulated water tank and the second insulated water tank stop storing water, the external water source stops taking in water, and at this time the side heat dissipation pipeline continues to dissipate heat and cool the refrigerant.

[0021] Preferably, the water level sensor is a pressure-type liquid level sensor, which includes a shell, an elastic diaphragm and a coil assembly. The elastic diaphragm is connected in the shell and forms a control cavity. The control cavity is connected to the first insulated water tank or the second insulated water tank through a connecting pipe. The coil assembly is installed on the shell, and an inner magnetic core that changes the inductance of the coil assembly is connected to the elastic diaphragm. The coil assembly is connected to the CPU control end through a signal line.

[0022] The resulting technical effect is: the pressure-type liquid level sensor can control the full water status of the first insulated water tank and the second insulated water tank. When the liquid level in the insulated water tank changes, the control cavity will be displaced accordingly, thereby driving the internal magnetic core to move, thereby changing the inductance on the coil assembly, and forming a resonance with the resistor and capacitor connected in the frequency discrimination circuit. The generated resonant frequency is related to the water level. The lower the water level, the lower the frequency. After this input frequency is processed by the CPU control end, the corresponding full water level of the insulated water tank can be set as required.

[0023] Preferably, the first heat exchanger, the second heat exchanger and the third heat exchanger are all plastic structure heat exchangers, and the plastic structure heat exchanger includes an outer shell, a refrigerant pipeline and a heat exchange medium pipeline. The interior of the outer shell is coiled with a heat exchange medium pipeline, and the refrigerant pipeline is arranged inside the heat exchange medium pipeline. The refrigerant pipeline is connected to the refrigerant circulation circuit, and the two ends of the outer shell are respectively provided with an inlet and an outlet connected to the heat exchange medium pipeline, and the first temperature hot water pipeline, the second temperature hot water pipeline and the cold water circuit respectively correspond to the heat exchange medium pipelines connected to the heat exchanger.

[0024] The resulting technical effect is: the refrigerant pipeline is arranged inside the heat exchange medium pipeline, the heat exchange efficiency is high, the refrigerant pipeline uses copper tubes for heat exchange, and the product material cost is more cost-effective than the air-cooled heat exchanger of the traditional air-conditioning refrigeration system.

[0025] Preferably, a cold water tank is arranged on the cold water circuit, and a water flow switch is connected to the cold water circuit.

[0026] The resulting technical effect is: the role of the water flow switch and the circulating water pump in the system is to ensure that water is always forced to flow at the evaporative cold end for heat exchange, avoiding the situation where the third heat exchanger freezes and fails due to water flow interruption, thereby affecting the cooling and heat exchange.

[0027] The present invention also discloses a temperature control method for an air-conditioning heat pump integrated machine, which uses the above control system, wherein a first thermostat detects the temperature of the refrigerant entering the first heat exchanger, and when the temperature reaches the temperature range set by the first thermostat, the first solenoid valve is opened, and the initial cold water in the first temperature hot water pipeline enters the first thermal insulation water tank for storage after absorbing heat through the first heat exchanger; a second thermostat detects the temperature of the refrigerant entering the second heat exchanger, and when the temperature of the refrigerant passing through the first heat exchanger drops and reaches the temperature range set by the second thermostat, the second solenoid valve is opened, and the initial cold water in the second temperature hot water pipeline enters the second thermal insulation water tank for storage after absorbing heat through the second heat exchanger;

[0028] The gradient hot water inside the first and second thermal insulation water tanks is used for daily life:

[0029] When the first and second insulated water tanks are full of water, the solenoid valve controls and stops the water storage in the first and second temperature water tanks, and the two-position three-way valve and water pump of the bypass pipeline are turned on, and bypass heat dissipation is realized in conjunction with the atomizing spray cooling water tank;

[0030] The cold water loop is controlled by a circulating pump and forces water to enter the third heat exchanger for heat exchange. The cold water loop is used as an air conditioning refrigeration system.

[0031] The resulting technical effect is: the present invention combines the use of air conditioning and heat pumps, both of which work using the Carnot refrigeration cycle. The temperature of the refrigerant increases after being compressed by the refrigeration compressor. After being cooled by the first and second heat exchangers, it is condensed into a high-pressure liquid state and then transported to the third heat exchanger through the throttling expansion valve of the refrigerant circulation loop. The liquid refrigerant absorbs heat and cools during the phase change process, and then returns to the refrigeration compressor through the gas-liquid separation tank for repeated circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of a temperature control system for an air-conditioning heat pump in an integrated machine according to the present invention;

[0033] Figure 2 The heat exchanger structure used in the temperature control system of an air conditioning heat pump using an integrated machine of the present invention Figure 1 ;

[0034] Figure 3 The heat exchanger structure used in the temperature control system of an air conditioner heat pump using an integrated machine of the present invention Figure 2 ;

[0035] Figure 4 This is a diagram of the use of a water level sensor in an air conditioning heat pump integrated temperature control system of the present invention;

[0036] Figure 5The present invention discloses an equivalent circuit diagram of a water level sensor of an air-conditioning heat pump integrated temperature control system.

[0037] 1 refrigerant circulation circuit, 2 first heat exchanger, 3 second heat exchanger, 4 third heat exchanger, 5 first temperature hot water pipeline, 6 first thermostat, 7 first solenoid valve, 8 second temperature hot water pipeline, 9 second thermostat, 10 second solenoid valve, 11 first insulation water tank, 12 second insulation water tank, 13 check valve, 14 water supply branch, 15 cold water circuit, 16 cooling fan coil, 17 circulation pump, 18 fan coil fan, 19 water flow switch, 20 Cold water tank, 21CPU control end, 22 two-position three-way valve, 23 water level sensor, 231 shell, 232 elastic diaphragm, 233 coil assembly, 234 control chamber, 235 connecting pipe, 236 inner magnetic core, 24 refrigeration compressor, 25 gas-liquid separation tank, 26 throttling expansion valve, 27 bypass pipeline, 28 atomizing spray cooling water tank, 29 water pump, 30 shell, 31 refrigerant pipeline, 32 heat exchange medium pipeline, 33 inlet, 34 outlet. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] See the attached Figures 1 to 5 According to an embodiment of the present invention, an air conditioning heat pump integrated temperature control system includes:

[0040] A refrigerant circulation loop 1, a first heat exchanger 2 is arranged on the side close to the hot end of the refrigerant circulation loop, a second heat exchanger 3 is arranged on the refrigerant circulation loop and downstream of the first heat exchanger 2, and the heat of the refrigerant downstream can also be used, and a third heat exchanger 4 is arranged on the side close to the cold end of the refrigerant circulation loop; the third heat exchanger is used as a cold end evaporator;

[0041] A first temperature hot water pipeline 5, the first temperature hot water pipeline 5 exchanges heat with the first heat exchanger, a first solenoid valve 7 and a first thermal insulation water tank 11 are arranged on the first temperature hot water pipeline 5, a first thermostat 6 for controlling the first solenoid valve is arranged on the refrigerant circulation circuit close to the first heat exchanger 2, and the water temperature of the first thermal insulation water tank can reach above 70°C;

[0042] The second temperature hot water pipeline 8 exchanges heat with the second heat exchanger 3. The second temperature hot water pipeline 8 is arranged with a second solenoid valve 10 and a second insulated water tank 12. A second thermostat 9 for controlling the second solenoid valve is arranged on the refrigerant circulation loop close to the second heat exchanger. The first temperature hot water pipeline 5 and the second temperature hot water pipeline 8 are connected to an external water source through a one-way valve 13. The water temperature in the first insulated water tank 11 is higher than the water temperature in the second insulated water tank 12. The water temperature in the second insulated water tank is generally around 45°C. When in use, the first insulated water tank and the second insulated water tank are arranged at a high position, and water is supplied to the outside by gravity, which is convenient for use.

[0043] The cold water loop 15 exchanges heat with the third heat exchanger 4. A cooling fan coil 16 and a circulation pump 17 are arranged on the cold water loop 15. A fan coil fan 18 is arranged on one side of the cooling fan coil 16 to assist in blowing out cold air, thereby realizing the use of air conditioning refrigeration.

[0044] The present invention sets two insulated water tanks with different temperature gradients because people have different requirements for water temperature in their lives. For example, bathing is generally at a medium temperature of about 45°C, while washing textiles with a higher water temperature will achieve better washing results. Drinking water needs a high temperature of 100°C for sterilization. At this time, we only need to filter the hot water of 70°C-80°C in the first insulated water tank and inject it into the electric water bottle. At this time, only less electric power is used to obtain clean and sterilized drinking water.

[0045] In other embodiments, a refrigeration compressor 24, a gas-liquid separation tank 25 and a throttling expansion valve 26 are arranged on the refrigerant circulation loop 1, the gas-liquid separation tank 25 is connected to the inlet end of the refrigeration compressor 24, the refrigeration compressor 24 is connected to the throttling expansion valve 26 through a pipeline, the throttling expansion valve 26 is connected to the gas-liquid separation tank 25 through a pipeline, the first heat exchanger 2 and the second heat exchanger 3 are arranged on the pipeline between the refrigeration compressor 24 and the throttling expansion valve 26, and the third heat exchanger 4 is arranged on the pipeline between the throttling expansion valve 26 and the gas-liquid separation tank 25.

[0046] In other specific embodiments, there are multiple groups of first heat exchangers 2 and second heat exchangers 3. Multiple groups of first heat exchangers 2 are arranged in parallel on the refrigerant circulation loop to realize primary multi-point heat exchange, and multiple groups of second heat exchangers 3 are arranged in parallel on the refrigerant circulation loop to realize secondary multi-point heat exchange. The primary and secondary refer to the difference in temperature gradients.

[0047] In some other embodiments, the water inlet ends of the first temperature hot water pipeline 5 and the second temperature hot water pipeline 8 are both connected to the water supply branch 14, and the water inlet sides of the first insulated water tank 11 and the second insulated water tank 12 are connected with solenoid valves, which can control the water flow state entering the insulated water tank. The first insulated water tank 11 and the second insulated water tank 12 are respectively connected with bypass pipelines 27 on one side close to the corresponding solenoid valve. The two bypass pipelines are connected in parallel and return to the water supply branch 14 after passing through the atomizing spray cooling water tank 28. A two-position three-way valve 22 is arranged before the bypass pipeline 27 enters the spray cooling water tank. A water pump 29 is provided on the water outlet pipeline after the atomizing spray cooling water tank. Water level sensors 23 are provided in the first insulated water tank 11 and the second insulated water tank 12, and the solenoid valve, the water level sensor 23, the two-position three-way valve 22 and the water pump 29 are respectively connected to the CPU control end 21 by electrical signals.

[0048] Specifically, the bypass pipe 27, the water pump 29 cooperate with the atomizing spray cooling water tank 28 to form a bypass heat dissipation pipe. It can be understood that when the first insulation water tank and the second insulation water tank are full of water, the external cold water supply is interrupted. At this time, the bypass heat dissipation pipe is needed to dissipate the heat in the refrigerant to ensure the normal operation of the subsequent air conditioning refrigeration system.

[0049] In some other specific embodiments, the water level sensor 23 is a pressure type liquid level sensor, and the water level sensor 23 includes a housing 231, an elastic diaphragm 232 and a coil assembly 233. The elastic diaphragm 232 is connected in the housing and forms a control cavity 234. The control cavity 234 is connected to the first insulation water tank 11 or the second insulation water tank 12 through a connecting pipe 235. The coil assembly 233 is installed on the housing 231. The elastic diaphragm 232 is connected to an inner magnetic core 236 for changing the coil inductance. The coil assembly is connected to the CPU control terminal 21 through a signal line. It should be noted that when the liquid level in the insulation water tank changes, the control cavity will be displaced accordingly and then drive the inner magnetic core to move, so that the inductance on the coil assembly changes, and the resonance is formed with the resistor and capacitor connected in the frequency discrimination circuit. The generated resonance frequency is related to the water level. The lower the water level, the lower the frequency. After the input frequency is processed by the CPU control terminal, the corresponding insulation water tank full water level can be set as required.

[0050] In some other embodiments, the first heat exchanger 2, the second heat exchanger 3, and the third heat exchanger 4 are all plastic structure heat exchangers, which include a shell 30, a refrigerant pipeline 31 and a heat exchange medium pipeline 32. The heat exchange medium pipeline 32 is coiled inside the shell 30, and the refrigerant pipeline 31 is arranged inside the heat exchange medium pipeline 32. The refrigerant pipeline 31 is connected to the refrigerant circulation loop 1. The two ends of the shell 30 are respectively provided with an inlet 33 and an outlet 34 connected to the heat exchange medium pipeline. The first temperature hot water pipeline 5, the second temperature hot water pipeline 8 and the cold water circuit 15 respectively correspond to the heat exchange medium pipeline 32 connected to the heat exchanger.

[0051] In other embodiments, a cold water tank 20 is arranged on the cold water loop 15, and a water flow switch 19 is connected to the cold water loop 15. The water flow switch and the circulation pump cooperate to realize the forced circulation heat exchange of water flow, thereby preventing the third heat exchanger from freezing due to lack of water inside, thereby affecting the subsequent heat exchange process.

[0052] The present invention also discloses a temperature control method for an air-conditioning heat pump integrated machine, which uses the above control system. When in use, a first thermostat detects the temperature of the refrigerant entering the first heat exchanger. When the temperature reaches the temperature range set by the first thermostat, the first solenoid valve is opened, and the initial cold water in the first temperature hot water pipeline enters the first thermal insulation water tank for storage after absorbing heat by the first heat exchanger; due to the temperature difference effect, the heat of the refrigerant cannot be fully utilized by the first heat exchanger, and the second thermostat detects the temperature of the refrigerant entering the second heat exchanger. The refrigerant passes through the first heat exchanger and generates a temperature drop. When the temperature reaches the temperature range set by the second thermostat, the second solenoid valve is opened, and the initial cold water in the second temperature hot water pipeline enters the second thermal insulation water tank for storage after absorbing heat by the second heat exchanger;

[0053] The gradient hot water inside the first and second thermal insulation water tanks is used for daily life:

[0054] When the first insulation water tank and the second insulation water tank are full of water, the solenoid valve controls and stops the water storage of the first temperature water tank and the second temperature water tank, and the two-position three-way valve and the water pump of the bypass pipeline are turned on, and the bypass heat dissipation is realized in conjunction with the atomizing spray cooling water tank;

[0055] The cold water loop is controlled by a circulation pump and forces water to enter the third heat exchanger for heat exchange. The cold water loop is used as an air conditioning refrigeration system.

[0056] It should be noted that the system of the present invention can be controlled by Bluetooth remote control as well as by 5G mobile phone APP to supply hot water and air conditioning according to life needs, which not only facilitates life but also saves energy and is environmentally friendly.

[0057] As for the device and the method of use disclosed in the embodiment, since they correspond to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0058] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air conditioning heat pump integrated temperature control system, characterized in that: include: A refrigerant circulation loop (1), a first heat exchanger (2) being arranged on a side close to a hot end of the refrigerant circulation loop, a second heat exchanger (3) being arranged on the refrigerant circulation loop and downstream of the first heat exchanger (2), and a third heat exchanger (4) being arranged on a side close to a cold end of the refrigerant circulation loop; A first temperature hot water pipeline (5), the first temperature hot water pipeline (5) exchanges heat with a first heat exchanger, a first solenoid valve (7) and a first heat-insulating water tank (11) are arranged on the first temperature hot water pipeline (5), and a first temperature controller (6) for controlling the first solenoid valve is arranged on a refrigerant circulation circuit close to the first heat exchanger (2); A second temperature hot water pipeline (8), the second temperature hot water pipeline (8) exchanges heat with the second heat exchanger (3), the second temperature hot water pipeline (8) is provided with a second solenoid valve (10) and a second thermal insulation water tank (12), a second temperature controller (9) for controlling the second solenoid valve is provided on the refrigerant circulation circuit close to the second heat exchanger, the first temperature hot water pipeline (5) and the second temperature hot water pipeline (8) are connected to an external water source via a one-way valve (13), and the water temperature in the first thermal insulation water tank (11) is higher than the water temperature in the second thermal insulation water tank (12); A cold water circuit (15), wherein the cold water circuit (15) exchanges heat with the third heat exchanger (4), and a refrigeration fan coil (16) and a circulation pump (17) are arranged on the cold water circuit (15), and a fan coil fan (18) is arranged on one side of the refrigeration fan coil (16) to assist in blowing out cold air.

2. The temperature control system for an air conditioning heat pump according to claim 1, characterized in that: The refrigerant circulation circuit (1) is provided with a refrigeration compressor (24), a gas-liquid separation tank (25) and a throttling expansion valve (26); the gas-liquid separation tank (25) is connected to the inlet end of the refrigeration compressor (24); the refrigeration compressor (24) is connected to the throttling expansion valve (26) via a pipeline; the throttling expansion valve (26) is connected to the gas-liquid separation tank (25) via a pipeline; the first heat exchanger (2) and the second heat exchanger (3) are arranged on the pipeline between the refrigeration compressor (24) and the throttling expansion valve (26); and the third heat exchanger (4) is arranged on the pipeline between the throttling expansion valve (26) and the gas-liquid separation tank (25).

3. The temperature control system for an air conditioning heat pump according to claim 2, characterized in that: There are multiple groups of the first heat exchanger (2) and the second heat exchanger (3). The multiple groups of the first heat exchanger (2) are arranged in parallel on the refrigerant circulation loop to realize primary multi-point heat exchange, and the multiple groups of the second heat exchanger (3) are arranged in parallel on the refrigerant circulation loop to realize secondary multi-point heat exchange.

4. The temperature control system for an air conditioning heat pump according to claim 1, characterized in that: The water inlet ends of the first temperature hot water pipeline (5) and the second temperature hot water pipeline (8) are both connected to the water supply branch (14); the water inlet sides of the first thermal insulation water tank (11) and the second thermal insulation water tank (12) are both connected to electromagnetic valves; the first thermal insulation water tank (11) and the second thermal insulation water tank (12) are respectively connected to bypass pipelines (27) on one side close to the corresponding electromagnetic valve; the two bypass pipelines are connected in parallel and return to the water supply after passing through the atomizing spray cooling water tank (28). A water branch (14), a two-position three-way valve (22) is arranged before the bypass pipeline (27) enters the atomizing spray cooling water tank, a water pump (29) is arranged on the water outlet pipeline after passing through the atomizing spray cooling water tank, a water level sensor (23) is arranged in the first thermal insulation water tank (11) and the second thermal insulation water tank (12), and the solenoid valve, the water level sensor (23), the two-position three-way valve (22) and the water pump (29) are respectively connected to the CPU control end (21) by electrical signals.

5. The temperature control system for an air conditioning heat pump according to claim 4, characterized in that: The bypass pipeline (27), the water pump (29) and the atomizing spray cooling water tank (28) form a bypass heat dissipation pipeline.

6. The temperature control system for an air conditioning heat pump according to claim 4, characterized in that: The water level sensor (23) is a pressure-type liquid level sensor, comprising a housing (231), an elastic diaphragm (232) and a coil assembly (233); the elastic diaphragm (232) is connected inside the housing and forms a control chamber (234); the control chamber (234) is connected to the first heat-insulating water tank (11) or the second heat-insulating water tank (12) via a connecting pipe (235); the coil assembly (233) is mounted on the housing (231); an inner magnetic core (236) for changing the coil inductance is connected to the elastic diaphragm (232); and the coil assembly is connected to a CPU control terminal (21) via a signal line.

7. The temperature control system for an air conditioning heat pump according to claim 1, characterized in that: The first heat exchanger (2), the second heat exchanger (3), and the third heat exchanger (4) are all heat exchangers of plastic material structure. The plastic material structure heat exchanger comprises an outer shell (30), a refrigerant pipeline (31), and a heat exchange medium pipeline (32). The heat exchange medium pipeline (32) is coiled inside the outer shell (30). The refrigerant pipeline (31) is arranged inside the heat exchange medium pipeline (32). The refrigerant pipeline (31) is connected to the refrigerant circulation circuit (1). The two ends of the outer shell (30) are respectively provided with an inlet (33) and an outlet (34) connected to the heat exchange medium pipeline. The first temperature hot water pipeline (5), the second temperature hot water pipeline (8), and the cold water circuit (15) are respectively connected to the heat exchange medium pipeline (32) of the heat exchanger.

8. The temperature control system for an air conditioning heat pump according to claim 1, characterized in that: A cold water tank (20) is arranged on the cold water circuit (15), and a water flow switch (19) is connected to the cold water circuit (15).

9. A temperature control method for an air conditioning heat pump, which uses a control system as claimed in any one of claims 1 to 8, characterized in that: The first thermostat detects the temperature of the refrigerant entering the first heat exchanger. When the temperature reaches the temperature range set by the first thermostat, the first solenoid valve opens, and the initial cold water in the first temperature hot water pipeline enters the first thermal insulation water tank for storage after absorbing heat through the first heat exchanger; the second thermostat detects the temperature of the refrigerant entering the second heat exchanger. The temperature of the refrigerant passing through the first heat exchanger drops. When the temperature reaches the temperature range set by the second thermostat, the second solenoid valve opens, and the initial cold water in the second temperature hot water pipeline enters the second thermal insulation water tank for storage after absorbing heat through the second heat exchanger; The gradient hot water inside the first and second thermal insulation water tanks is used for daily life: When the first insulation water tank and the second insulation water tank are full of water, the solenoid valve controls and stops the water storage of the first temperature water tank and the second temperature water tank, and the two-position three-way valve and the water pump of the bypass pipeline are turned on, and the bypass heat dissipation is realized in conjunction with the atomizing spray cooling water tank; The cold water loop is controlled by a circulation pump and forces water to enter the third heat exchanger for heat exchange. The cold water loop is used as an air conditioning refrigeration system.

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