A temperature regulation method

Abstract

The present application relates to a temperature regulation method, comprising the following steps: first, setting a controller and a fluid sensor in a heating and ventilation system, the heating and ventilation system comprising an outdoor heat exchanger unit, an indoor heat exchanger unit and a fluid circulating pump, wherein the outdoor heat exchanger unit and the indoor heat exchanger unit are connected together through a fluid pipeline to form a fluid passage, a fluid medium is arranged in the fluid passage, the fluid circulating pump is arranged in the fluid passage, and the outdoor heat exchanger unit, the indoor heat exchanger unit, the fluid circulating pump and the fluid sensor are connected with the controller respectively; second, starting the heating and ventilation system; and third, regulating the working temperature of the heating and ventilation system through the controller and the fluid sensor.

Description

Technical Field

[0001] This invention relates to a temperature control method, and more particularly to a temperature control method applied in the field of heating, ventilation and air conditioning. Background Technology

[0002] As is well known, HVAC is an integral part of buildings. It mainly includes three aspects: heating, ventilation, and air conditioning. HVAC has become a major component in improving the ambient temperature of buildings.

[0003] like Figure 1 The diagram shown is a schematic of a traditional HVAC system, which includes a heat exchange section 1, an indoor ambient temperature conversion section 2, and pipes 3.

[0004] The pipe 3 is connected between the heat exchange section 1 and the indoor ambient temperature conversion section 2. The fluid medium circulates among the three. The heat exchange section 1 is mainly used for heat exchange between the fluid medium and the external environment. The indoor ambient temperature conversion section 2 is mainly used for heat exchange between the fluid medium and the indoor environment 4. The heat exchange section 1 and the indoor ambient temperature conversion section 2 are used to improve the temperature in the indoor environment 4.

[0005] In practice, the heat exchange section 1 is generally the outdoor unit of equipment such as wall-hung boilers, central air conditioners, and heat pumps, while the indoor ambient temperature conversion section 2 is generally the indoor unit of equipment such as wall-hung boilers, central air conditioners, and heat pumps.

[0006] However, traditional HVAC systems still have many shortcomings in practical applications, which are described below.

[0007] Firstly, traditional HVAC systems generally do not monitor the circulation flow rate of fluid media. However, if the circulation system becomes blocked, the pump malfunctions, or the valve closes, the circulation of the fluid media will slow down or stop. Since the HVAC system does not monitor the circulation flow rate of the fluid media, it will continue to be in a heating state under such circumstances. This situation will inevitably lead to wasted heating energy and damage to the system's structural components due to overheating.

[0008] Secondly, in traditional HVAC systems, the temperature monitoring device is usually only installed in the indoor ambient temperature conversion section 2. The circulation flow rate of the fluid medium in the HVAC system is generally not detected. Therefore, the temperature monitoring device cannot be linked with the heat exchange section 1 and the indoor ambient temperature conversion section 2, and cannot achieve the function of precise temperature control.

[0009] Furthermore, temperature detection devices in traditional HVAC systems are generally not well matched with the system, resulting in large detection errors and failing to meet the requirements of automatic detection and control. This can lead to a reduction in the system's lifespan and failure to meet user requirements. Summary of the Invention

[0010] The technical solution adopted in this invention is as follows: a temperature control method, comprising the following control steps: First, a controller and a fluid sensor are installed in the HVAC system. The HVAC system includes an outdoor heat exchanger unit, an indoor heat exchanger unit, and a fluid circulation pump. The outdoor heat exchanger unit and the indoor heat exchanger unit are connected together through a fluid pipeline to form a fluid passage. A fluid medium is placed in the fluid passage. The fluid circulation pump is placed in the fluid passage and causes the fluid medium to circulate between the outdoor heat exchanger unit and the indoor heat exchanger unit. The outdoor heat exchanger unit, the indoor heat exchanger unit, the fluid circulation pump, and the fluid sensor are respectively connected to the controller. Second, the HVAC system is started, the fluid circulation pump operates, and the fluid circulation pump drives the fluid medium to flow in the fluid passage. The operating power value of the outdoor heat exchanger unit is transmitted to the controller. The fluid sensor collects the flow rate value of the fluid medium in the fluid passage and transmits the flow rate value to the controller. Third, the operating temperature of the HVAC system is controlled by the controller and the fluid sensor.

[0011] In the third step, the operating temperature of the HVAC system is regulated as follows: When the indoor heat exchanger unit receives a temperature increase value, the temperature increase value is transmitted to the controller. The controller converts the temperature increase value into a required increase in flow rate and a required increase in power. Specifically, the controller calculates the difference between the required increase in flow rate and the current flow rate to form a flow rate increase value. The controller converts the flow rate increase value into a circulation pump speed increase value. The controller controls the circulation pump to increase its speed based on the circulation pump speed increase value, thereby increasing the flow rate of the fluid medium in the fluid passage. Simultaneously, the controller calculates the difference between the required increase in power and the current operating power value to form a power increase value. The controller converts the power increase value into a power increase value. The controller controls the outdoor heat exchanger unit to increase its operating power based on the power increase value, thereby increasing the temperature of the fluid medium in the fluid passage.

[0012] When the indoor heat exchanger unit receives a temperature drop value, the temperature drop value is transmitted to the controller. The controller converts the temperature drop value into a required flow rate reduction value and a required power reduction value. Specifically, the controller calculates the difference between the required flow rate reduction value and the current flow rate value to form a flow rate reduction value. The controller converts the flow rate reduction value into a circulation pump speed reduction value. The controller controls the fluid circulation pump to reduce its speed based on the circulation pump speed reduction value, thereby reducing the flow rate of the fluid medium in the fluid passage. At the same time, the controller calculates the difference between the required power reduction value and the current operating power value to form a power reduction value. The controller converts the power reduction value into a power reduction value. The controller controls the outdoor heat exchanger unit to reduce its operating power based on the power reduction value, thereby reducing the temperature of the fluid medium in the fluid passage.

[0013] In the third step, the fluid sensor is placed in the fluid medium in the fluid passage. The fluid sensor samples the flow rate of the fluid medium in real time. The fluid sensor has an inlet end and an outlet end, which are located on both sides of the fluid sensor. The fluid medium flows from the inlet end to the outlet end. When the fluid medium flows, it first contacts the inlet end, then flows through the fluid sensor, and finally flows out from the outlet end. The inlet end is the heating and temperature measuring end, and the outlet end is the temperature measuring end.

[0014] There is a flow distance between the inlet and the outlet. The inlet can measure the temperature of the fluid medium flowing through it to obtain the inlet temperature value. The inlet can heat the fluid medium flowing through it to give it a temperature rise value. The sum of the inlet temperature value and the temperature rise value is the superimposed temperature. The outlet can measure the temperature of the fluid medium flowing through it to obtain the outlet temperature value. The difference between the superimposed temperature and the outlet temperature value is the difference temperature. The cooling time required for the fluid medium to reduce the difference temperature is determined. Based on the cooling time and the flow distance, the flow rate of the fluid medium flowing through the fluid sensor is obtained.

[0015] The fluid sensor also includes a sensor controller. The inflow end and the outflow end are respectively connected to the sensor controller. The temperature rise value, the cooling time calculation program, and the flow distance are respectively stored in the sensor controller. The inflow temperature value measured at the inflow end is transmitted to the sensor controller. The sensor controller controls the inflow end to heat the flowing fluid medium through the temperature rise value. The sensor controller calculates the superimposed temperature. The outflow temperature value measured at the outflow end is transmitted to the sensor controller. The sensor controller calculates the difference temperature. The sensor controller determines the cooling time based on the difference temperature and the cooling time calculation program. The sensor controller obtains the flow rate value based on the cooling time and the flow distance. The difference temperature corresponds to the cooling time calculation program.

[0016] The inflow end includes an inflow end carrier plate, a first temperature sensor, and a heater, wherein the first temperature sensor and the heater are disposed on the inflow end carrier plate. The outflow end includes an outflow end carrier plate and a second temperature sensor, wherein the second temperature sensor is disposed on the outflow end carrier plate. The first temperature sensor, the heater, and the second temperature sensor are arranged sequentially from front to back in the flow direction of the fluid medium.

[0017] The inflow and outflow carrier plates are inclinedly arranged in the flow direction of the fluid medium. The heater corresponds to the second thermometer. The first thermometer is used to measure the inflow temperature value. The heater heats the fluid medium flowing through it, so that the fluid medium has the temperature rise value. The second thermometer is used to measure the outflow temperature value.

[0018] The fluid sensor also includes an isolation conduction structure, in which the inflow end carrier plate and the outflow end carrier plate are embedded.

[0019] The fluid sensor also includes a sensor encapsulation cylinder, in which the isolation and conduction structure is filled. The fluid medium flows through both sides of the sensor encapsulation cylinder. The sensor encapsulation cylinder has a bottom and a side wall. The side wall is fixedly connected to the bottom of the cylinder. The bottom and the side wall surround each other to form a cavity. The isolation and conduction structure is disposed in the cavity.

[0020] The sidewall is recessed with a first temperature-measuring vortex cavity, a heating vortex cavity, and a second temperature-measuring vortex cavity. The first temperature-measuring vortex cavity corresponds to the first thermometer on the inflow end carrier plate, the heating vortex cavity corresponds to the heater on the inflow end carrier plate, and the second temperature-measuring vortex cavity corresponds to the second thermometer on the outflow end carrier plate. The fluid medium flowing from one side of the sensor encapsulation cylinder flows sequentially through the first temperature-measuring vortex cavity, the heating vortex cavity, and the second temperature-measuring vortex cavity. When the fluid medium flows through the first temperature-measuring vortex cavity, the first thermometer measures the temperature of the fluid medium. When the fluid medium flows through the heating vortex cavity, the heater heats the fluid medium. When the fluid medium flows through the second temperature-measuring vortex cavity, the second thermometer measures the temperature of the fluid medium.

[0021] A temperature control method, characterized by comprising the following control steps: First, a controller and a fluid sensor are installed in a heating, ventilation, and air conditioning (HVAC) system. The HVAC system includes an outdoor heat exchanger unit, an indoor heat exchanger unit, and a fluid circulation pump. The outdoor heat exchanger unit and the indoor heat exchanger unit are connected together through a fluid pipeline to form a fluid passage. A fluid medium is disposed in the fluid passage, and the fluid circulation pump is disposed in the fluid passage. The fluid circulation pump causes the fluid medium to circulate between the outdoor heat exchanger unit and the indoor heat exchanger unit, thereby achieving the function of controlling the indoor temperature through the indoor heat exchanger unit. The outdoor heat exchanger unit, the indoor heat exchanger unit, the fluid circulation pump, and the fluid sensor are respectively connected to the controller.

[0022] The second step involves regulating the operating temperature of the HVAC system through the controller and the fluid sensor. A preset temperature value is set in the indoor heat exchanger unit and transmitted to the controller. The fluid sensor continuously collects the fluid temperature value of the fluid medium in the fluid passage and transmits it to the controller. The controller then compares the preset temperature value with the fluid temperature value.

[0023] When the preset temperature value is lower than the fluid temperature value, the controller controls the fluid circulation pump to accelerate its operation, increasing the flow rate of the fluid medium and raising the temperature of the indoor heat exchanger unit. During this process, the controller increases the operating power of the outdoor heat exchanger unit to accelerate the heating of the indoor heat exchanger unit.

[0024] When the preset temperature value is greater than the fluid temperature value, the controller controls the fluid circulation pump to reduce its speed and decrease the flow rate of the fluid medium in order to save energy. During this process, the controller reduces the operating power of the outdoor heat exchanger unit to save energy.

[0025] When the preset temperature value equals the fluid temperature value, the controller controls the fluid circulation pump to maintain its original speed. During this process, the controller maintains the original operating power of the outdoor heat exchanger unit.

[0026] The beneficial effects of this invention are as follows: By using a fluid sensor to monitor the flow rate of the fluid medium in the fluid passage in real time, the overall temperature control system can be monitored and controlled in real time. In the temperature control system, the fluid medium is the most direct carrier for temperature regulation. Monitoring and controlling the fluid medium to control the overall temperature control system is highly efficient, direct, and accurate. The main working principle of this invention is as follows: During heating, increasing the fluid medium flow rate and the operating power of the outdoor heat exchanger unit increases the heat exchange capacity of the indoor heat exchanger unit, thereby increasing the indoor temperature. During cooling, decreasing the fluid medium flow rate and the operating power of the outdoor heat exchanger unit decreases the heat exchange capacity of the indoor heat exchanger unit, thereby decreasing the indoor temperature. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an existing HVAC system.

[0028] Figure 2 This is a schematic diagram of the present invention.

[0029] Figure 3 This is a schematic diagram illustrating the principle of the present invention.

[0030] Figure 4 This is a schematic diagram of the fluid sensor of the present invention.

[0031] Figure 5 This is a schematic diagram illustrating the principle of the fluid sensor of the present invention.

[0032] Figure 6 This is a three-dimensional structural diagram of the fluid sensor of the present invention.

[0033] Figure 7 This is a schematic diagram showing the positions of the first temperature sensor, the heater, and the second temperature sensor of the present invention.

[0034] Figure 8 This is a top view of the first temperature sensor, heater, and second temperature sensor of the present invention.

[0035] Figure 9 This is a cross-sectional schematic diagram of the isolation and conduction structure of the present invention.

[0036] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure along the AA direction.

[0037] Figure 11 This is a top view of the cylindrical packaging tube of the present invention.

[0038] Figure 12 This is a top view of the sensor packaging cylinder of the present invention.

[0039] Figure 13 This is a top view of another sensor packaging cylinder according to the present invention.

[0040] Figure 14 This is a top view of the third type of sensor packaging tube of the present invention.

[0041] Figure 15 This is a schematic diagram of the sensor packaging tube of the present invention.

[0042] Figure 16 This is a schematic diagram of another sensor packaging tube according to the present invention. Detailed Implementation

[0043] like Figures 2 to 16 As shown, a temperature control method includes the following control steps.

[0044] Step 1: Install controller 9 and fluid sensor 10 in the HVAC system.

[0045] The HVAC system includes an outdoor heat exchanger unit 5, an indoor heat exchanger unit 6, and a fluid circulation pump 7. The outdoor heat exchanger unit 5 and the indoor heat exchanger unit 6 are connected together by a fluid pipeline 8 to form a fluid passage, in which the fluid medium is disposed.

[0046] The fluid circulation pump 7 is installed in the fluid passage, and the fluid circulation pump 7 causes the fluid medium to circulate between the outdoor heat exchanger unit 5 and the indoor heat exchanger unit 6, thereby achieving the function of regulating the indoor temperature through the indoor heat exchanger unit 6.

[0047] The outdoor heat exchanger unit 5, the indoor heat exchanger unit 6, the fluid circulation pump 7, and the fluid sensor 10 are respectively connected to the controller 9.

[0048] Step 2: Start the HVAC system.

[0049] The fluid circulation pump 7 operates, and the fluid circulation pump 7 drives the flow of the fluid medium in the fluid passage.

[0050] The operating power value P of the outdoor heat exchanger unit 5 is transmitted to the controller 9, and the fluid sensor 10 collects the flow rate value S of the fluid medium in the fluid passage, and the flow rate value S is transmitted to the controller 9.

[0051] The third step is to regulate the operating temperature of the HVAC system through the controller 9 and the fluid sensor 10.

[0052] In the third step, the operating temperature of the HVAC system is adjusted in the following way.

[0053] When the indoor heat exchanger unit 6 receives a temperature rise value T1, the temperature rise value T1 is transmitted to the controller 9, and the controller 9 converts the temperature rise value T1 into a required flow rate value S1 and a required power value P1.

[0054] Specifically, the controller 9 calculates the difference between the required flow rate value S1 and the current flow rate value S to form a flow rate increase value. The controller 9 converts this flow rate increase value into a circulation pump speed increase value, and controls the circulation pump 7 to increase its speed based on this increase value, thereby increasing the flow rate of the fluid medium in the fluid passage. Simultaneously, the controller 9 calculates the difference between the required power value P1 and the current operating power value P to form a power increase value. The controller 9 converts this power increase value into a power increase value, and controls the outdoor heat exchanger unit 5 to increase its operating power based on this power increase value, thereby increasing the temperature of the fluid medium in the fluid passage.

[0055] When the indoor heat exchanger unit 6 receives a temperature drop value T2, the temperature drop value T2 is transmitted to the controller 9, which converts the temperature drop value T2 into a flow rate value S2 that needs to be reduced and a power value P2 that needs to be reduced.

[0056] Specifically, the controller 9 calculates the difference between the required flow rate reduction value S2 and the flow rate value S to form a flow rate reduction value. The controller 9 converts this flow rate reduction value into a circulation pump speed reduction value, and controls the fluid circulation pump 7 to reduce its speed based on this circulation pump speed reduction value, thereby reducing the flow rate of the fluid medium in the fluid passage. Simultaneously, the controller 9 calculates the difference between the required power reduction value P2 and the operating power value P to form a power reduction value. The controller 9 converts this power reduction value into a power adjustment value, and controls the outdoor heat exchanger unit 5 to reduce its operating power based on this power adjustment value, thereby lowering the temperature of the fluid medium in the fluid passage.

[0057] As described above, the main design concept of this invention is to achieve the purpose of real-time monitoring and control of the overall temperature control system by using the fluid sensor 10 to monitor the flow rate of the fluid medium in the fluid passage. In the temperature control system, the fluid medium is the most direct carrier for temperature control. The method of monitoring and controlling the fluid medium to control the overall temperature control system has the effects of high efficiency, directness and accuracy.

[0058] The main working principle of this invention is as follows: during heating, the flow rate of the fluid medium is increased, and the operating power of the outdoor heat exchanger unit is increased, thereby enhancing the heat exchange capacity of the indoor heat exchanger unit and thus raising the indoor temperature. During cooling, the flow rate of the fluid medium is decreased, and the operating power of the outdoor heat exchanger unit is reduced, thereby reducing the heat exchange capacity of the indoor heat exchanger unit and thus lowering the indoor temperature.

[0059] In practical implementation, the controller 9 can convert the temperature rise value T1 and the temperature drop value T2 into the required flow rate value S1, the required power value P1, the required flow rate value S2, and the required power value P2 through software conversion or preset values. For example, when the temperature rise value T1 is 5 degrees Celsius, the required flow rate value S1 is set to 2 dm / s, and the required power value P1 is set to 1.5 KW / h, and so on. In practice, other parameter settings in the temperature control system can also be implemented through the software in the controller 9.

[0060] In practice, the outdoor heat exchanger unit 5 can be a heat exchanger, such as a wall-hung boiler, and the indoor heat exchanger unit 6 can be a radiator or a floor heating system.

[0061] In specific implementation, the fluid sensor 10 in the third step is placed in the fluid medium of the fluid passage, and the fluid sensor 10 samples the flow rate S of the fluid medium in real time.

[0062] The fluid sensor 10 has an inlet end 11 and an outlet end 12, which are located on opposite sides of the fluid sensor 10. The fluid medium flows from the inlet end 11 to the outlet end 12. When the fluid medium flows, it first contacts the inlet end 11, then flows through the fluid sensor 10, and finally flows out from the outlet end 12.

[0063] The inflow end 11 is a heating and temperature measuring end, the outflow end 12 is a temperature measuring end, and there is a flow distance d between the inflow end 11 and the outflow end 12.

[0064] The inlet end 11 can measure the temperature of the fluid medium flowing through it and obtain the inlet temperature value t1.

[0065] The inlet end 11 can heat the fluid medium flowing through it, so that the fluid medium has a temperature rise value t2.

[0066] The sum of the inflow temperature t1 and the temperature rise t2 is the superimposed temperature t3, t1+t2=t3.

[0067] The outlet end 12 can measure the temperature of the fluid medium flowing through it and obtain the outlet temperature value t4.

[0068] The difference between the superimposed temperature t3 and the outflow temperature t4 is the difference temperature t5, where t3-t4=t5.

[0069] Determine the cooling time TIME required for the fluid medium to decrease the temperature difference t5.

[0070] The flow velocity S of the fluid medium flowing through the fluid sensor 10 is obtained based on the cooling time TIME and the flow distance d, where S = d / TIME.

[0071] In practice, the temperature rise t2 is 10°C to 30°C higher than the inflow temperature t1.

[0072] In practice, the cooling time TIME can be determined by the physical properties of the fluid medium. For example, the cooling time TIME can be determined by the thermal conductivity and heat dissipation rate of the fluid medium. The cooling time TIME is different for different fluid media. For example, liquid water and liquid oil have different cooling times TIME.

[0073] The above content is illustrated in the following example: if the inflow temperature t1 is 30℃, the temperature rise t2 is 20℃, the flow distance d is 2cm, and the outflow temperature t4 is 45℃, then the superimposed temperature t3 is 50℃, and the difference temperature t5 is 5℃. Based on the physical properties of the fluid medium itself, the cooling time TIME required for the fluid medium to cool down by 5℃ is determined. Finally, the flow velocity of the fluid medium is calculated by the flow distance d and the cooling time. The determination of the cooling time is existing technology and will not be elaborated here.

[0074] In a specific implementation, the fluid sensor 10 also includes a sensor controller 13, and the inflow end 11 and the outflow end 12 are respectively connected to the sensor controller 13.

[0075] The calculation programs for the temperature rise t2, the cooling time TIME, and the flow distance d are respectively stored in the sensor controller 13.

[0076] In practice, several temperature rise values ​​t2 are stored in the sensor controller 13. The sensor controller 13 can determine specific temperature rise values ​​t2 for heating according to different usage scenarios. Several cooling time TIME calculation programs are stored in the sensor controller 13. Different cooling time TIME calculation programs correspond to different scenarios and different fluid media. The specific value of the flow distance d can be set according to the specifications of the fluid sensor 10.

[0077] The inflow temperature value t1 measured at the inflow end 11 is transmitted to the sensor controller 13.

[0078] The sensor controller 13 controls the intensity of heating of the fluid medium flowing through the inflow end 11 by the temperature rise value t2.

[0079] The superimposed temperature t3 is calculated by the sensor controller 13.

[0080] The outflow temperature value t4 measured at the outflow end 12 is transmitted to the sensor controller 13.

[0081] The temperature difference t5 is calculated by the sensor controller 13.

[0082] The sensor controller 13 determines the cooling time TIME based on the temperature difference t5 and the cooling time TIME calculation program, and the sensor controller 13 obtains the flow velocity value S based on the cooling time TIME and the flow distance d.

[0083] The temperature difference t5 corresponds to the calculation procedure for the cooling time TIME.

[0084] In a specific implementation, the inflow end 11 includes an inflow end carrier plate 110, a first temperature sensor 120, and a heater 130, wherein the first temperature sensor 120 and the heater 130 are disposed on the inflow end carrier plate 110.

[0085] The outflow end 12 includes an outflow end carrier plate 140 and a second temperature sensor 150, wherein the second temperature sensor 150 is disposed on the outflow end carrier plate 140.

[0086] The first thermometer 120, the heater 130, and the second thermometer 150 are arranged sequentially from front to back in the flow direction of the fluid medium.

[0087] In a specific implementation, the inflow end carrier plate 110 and the outflow end carrier plate 140 are inclinedly arranged in the flow direction of the fluid medium. The fluid medium flows sequentially through the first thermometer 120, the heater 130 and the second thermometer 150, with the heater 130 corresponding to the second thermometer 150.

[0088] The first thermometer 120 is used to measure the inflow temperature value t1, the heater 130 heats the fluid medium flowing through it to give the fluid medium the temperature rise value t2, and the second thermometer 150 is used to measure the outflow temperature value t4.

[0089] In practice, the first thermometer 120 and the second thermometer 150 can be made of temperature-sensing metal sheets, and the heater 130 can be made of electric heating wire. These are all existing technologies and will not be elaborated here.

[0090] In practice, the fluid sensor 10 can achieve the above-mentioned functions in various ways. Some preferred embodiments are disclosed below.

[0091] The fluid sensor 10 also includes an isolation conduction structure 200, in which the inflow end carrier plate 110 and the outflow end carrier plate 140 are embedded.

[0092] The isolation and conduction structure 200 includes an isolation section 210, a first temperature-sensing conduction section 220, a heating conduction section 230, and a second temperature-sensing conduction section 240.

[0093] The isolation portion 210 is located between the inflow end carrier plate 110 and the outflow end carrier plate 140. The isolation portion 210 is used to form signal interference shielding and heat shielding between the inflow end carrier plate 110 and the outflow end carrier plate 140.

[0094] The isolation section 210 is fitted with an isolation plate 211. In practice, the isolation plate 211 can be made of ceramic, glass or other shielding and heat-insulating materials.

[0095] The first temperature sensing conductive portion 220 corresponds to the first temperature sensor 120 of the inflow end carrier plate 110, and the first temperature sensor 120 is wrapped and disposed between the first temperature sensing conductive portion 220 and the isolation portion 210.

[0096] The heating conduction portion 230 corresponds to the heater 130 of the inflow end carrier plate 110, and the heater 130 is wrapped and disposed between the heating conduction portion 230 and the isolation portion 210.

[0097] The second temperature sensing conductive portion 240 corresponds to the second temperature sensor 150 of the outflow end carrier plate 140, and the second temperature sensor 150 is wrapped and disposed between the second temperature sensing conductive portion 240 and the isolation portion 210.

[0098] The isolation and conduction structure 200 also includes a fixed base 250.

[0099] The isolation part 210, the first temperature measuring and conducting part 220, the heating and conducting part 230, and the second temperature measuring and conducting part 240 are all fixedly connected to the fixed base 250.

[0100] In actual production, the isolation and conduction structure 200 is produced in one piece, for example, by one-time injection molding.

[0101] In specific implementation, the isolation part 210 is made of heat-insulating adhesive, the first temperature-conducting part 220 and the second temperature-conducting part 240 are made of thermally conductive adhesive, and the heating conduction part 230 is made of thermally transfer adhesive. The heat-insulating adhesive, thermally conductive adhesive and thermally transfer adhesive can all be made of special silicone, which belongs to the prior art and will not be elaborated here.

[0102] In practice, the isolation part 210, the first temperature conducting part 220, the heating conducting part 230, the second temperature conducting part 240, and the fixed base 250 can be made of the same silicone material to facilitate one-time production.

[0103] In specific implementation, a heat-conducting layer 260 is provided on the outer surface of the first temperature-conducting part 220, the heating-conducting part 230 and the second temperature-conducting part 240. The heat-conducting layer 260 can improve the temperature measurement and heating efficiency of the first temperature sensor 120, the heater 130 and the second temperature sensor 150 and improve the heat transfer rate.

[0104] The thermally conductive layer 260 can be a layer of silver, copper, or other metals.

[0105] In practice, the isolation and conduction structure 200 is set inside the cylindrical encapsulation tube 270, and the first temperature conducting part 220, the heating conducting part 230 and the second temperature conducting part 240 are respectively attached to the inner surface of the cylindrical encapsulation tube 270.

[0106] In a specific implementation, the fluid sensor 10 also includes a sensor encapsulation cylinder 300, in which the isolation and conduction structure 200 is filled, and the fluid medium flows through both sides of the sensor encapsulation cylinder 300.

[0107] The sensor encapsulation cylinder 300 has a bottom 310 and a side wall 320. The side wall 320 is fixedly connected to the bottom 310. The bottom 310 and the side wall 320 surround each other to form a cavity 330. The isolation and conduction structure 200 is disposed in the cavity 330.

[0108] The sidewall 320 is recessed and provided with a first temperature measuring vortex cavity 410, a heating vortex cavity 420 and a second temperature measuring vortex cavity 430, wherein the first temperature measuring vortex cavity 410 corresponds to the first thermometer 120 of the inflow end carrier plate 110, the heating vortex cavity 420 corresponds to the heater 130 of the inflow end carrier plate 110, and the second temperature measuring vortex cavity 430 corresponds to the second thermometer 150 of the outflow end carrier plate 140.

[0109] The fluid medium flowing from one side of the sensor encapsulation cylinder 300 flows sequentially through the first temperature-measuring vortex cavity 410, the heating vortex cavity 420, and the second temperature-measuring vortex cavity 430. When the fluid medium flows through the first temperature-measuring vortex cavity 410, the first temperature sensor 120 measures the temperature of the fluid medium. When the fluid medium flows through the heating vortex cavity 420, the heater 130 heats the fluid medium. When the fluid medium flows through the second temperature-measuring vortex cavity 430, the second temperature sensor 150 measures the temperature of the fluid medium.

[0110] As described above, by providing the first temperature-sensing vortex cavity 410, the heating vortex cavity 420, and the second temperature-sensing vortex cavity 430, the residence time of the fluid medium flowing through the first temperature sensor 120, the heater 130, and the second temperature sensor 150 can be extended. This allows the first temperature sensor 120, the heater 130, and the second temperature sensor 150 to fully contact the fluid medium, thereby enabling more accurate and thorough temperature measurement and heating operations.

[0111] In a specific implementation, the sidewall 320 has an inclined side plate 321. The first temperature measuring vortex cavity 410 and the heating vortex cavity 420 are simultaneously disposed on one side of the inclined side plate 321. The first temperature measuring vortex cavity 410 and the heating vortex cavity 420 are connected. The inclined side plate 321 can make the flow of the fluid medium smoother. In a specific implementation, the inclined side plate 321 forms an angle with the flow direction of the fluid medium. The angle is greater than 120 degrees and less than 180 degrees.

[0112] A temperature control method includes the following control steps.

[0113] Step 1: Install controller 9 and fluid sensor 10 in the HVAC system.

[0114] The HVAC system includes an outdoor heat exchanger unit 5, an indoor heat exchanger unit 6, and a fluid circulation pump 7. The outdoor heat exchanger unit 5 and the indoor heat exchanger unit 6 are connected together by a fluid pipeline 8 to form a fluid passage, in which the fluid medium is disposed.

[0115] The fluid circulation pump 7 is installed in the fluid passage, and the fluid circulation pump 7 causes the fluid medium to circulate between the outdoor heat exchanger unit 5 and the indoor heat exchanger unit 6, thereby achieving the function of regulating the indoor temperature through the indoor heat exchanger unit 6.

[0116] The outdoor heat exchanger unit 5, the indoor heat exchanger unit 6, the fluid circulation pump 7, and the fluid sensor 10 are respectively connected to the controller 9.

[0117] The second step is to regulate the operating temperature of the HVAC system through the controller 9 and the fluid sensor 10.

[0118] The indoor heat exchanger unit 6 has a preset temperature value, which is transmitted to the controller 9. The fluid sensor 10 continuously collects the fluid temperature value of the fluid medium in the fluid passage, which is transmitted to the controller 9. The controller 9 compares the preset temperature value with the fluid temperature value.

[0119] When the preset temperature value is lower than the fluid temperature value, the controller 9 controls the fluid circulation pump 7 to accelerate its operation, increase the flow rate of the fluid medium, and raise the temperature of the indoor heat exchanger unit 6. During this process, the controller 9 increases the operating power of the outdoor heat exchanger unit 5 to accelerate the temperature rise of the indoor heat exchanger unit 6.

[0120] When the preset temperature value is greater than the fluid temperature value, the controller 9 controls the fluid circulation pump 7 to reduce its speed and decrease the flow rate of the fluid medium in order to save energy. During this process, the controller 9 reduces the operating power of the outdoor heat exchanger unit 5 to save energy.

[0121] When the preset temperature value is equal to the fluid temperature value, the controller 9 controls the fluid circulation pump 7 to maintain its original speed. During this process, the controller 9 maintains the original operating power of the outdoor heat exchanger unit 5.

Claims

1. A temperature control method, characterized in that, The following control measures are included: The first step is to install controllers and fluid sensors in the HVAC system. The HVAC system includes an outdoor heat exchanger unit, an indoor heat exchanger unit, and a fluid circulation pump. The outdoor and indoor heat exchanger units are connected via fluid piping to form a fluid passage. A fluid medium is disposed within this fluid passage, and the fluid circulation pump is located within it, causing the fluid medium to circulate between the outdoor and indoor heat exchanger units. The outdoor heat exchanger unit, the indoor heat exchanger unit, the fluid circulation pump, and the fluid sensor are all connected to a controller. Step 2: Start the HVAC system. The fluid circulation pump operates, driving the fluid medium to flow in the fluid passage. The operating power value of the outdoor heat exchanger unit is transmitted to the controller. The fluid sensor collects the flow rate value of the fluid medium in the fluid passage, and this flow rate value is also transmitted to the controller. The third step is to regulate the operating temperature of the HVAC system using the controller and the fluid sensor. In the third step, the operating temperature of the HVAC system is adjusted in the following way. When the indoor heat exchanger unit receives a temperature increase, this temperature increase is transmitted to the controller. The controller converts this temperature increase into a required increase in flow rate and a required increase in power. Specifically, the controller calculates the difference between the required increase in flow rate and the current flow rate to form a flow rate increase value. This flow rate increase value is then converted into an increase in the circulation pump speed. The controller uses this increase in pump speed to control the circulation pump to increase its speed, thereby increasing the flow rate of the fluid medium in the fluid passage. Simultaneously, the controller calculates the difference between the required increase in power and the current operating power to form a power increase value. This power increase value is then converted into a power increase value. The controller uses this power increase value to control the outdoor heat exchanger unit to increase its operating power, thereby increasing the temperature of the fluid medium in the fluid passage. When the indoor heat exchanger unit receives a temperature drop value, this value is transmitted to the controller. The controller converts the temperature drop value into a required flow rate reduction value and a required power reduction value. Specifically, the controller calculates the difference between the required flow rate reduction value and the current flow rate to form a flow rate reduction value. This flow rate reduction value is then converted into a circulation pump speed reduction value. The controller uses this reduced pump speed value to control the fluid circulation pump to reduce its speed, thereby lowering the flow rate of the fluid medium in the fluid passage. Simultaneously, the controller calculates the difference between the required power reduction value and the current operating power value to form a power reduction value. This power reduction value is converted into a power adjustment value. The controller uses this power adjustment value to control the outdoor heat exchanger unit to lower its operating power, thereby reducing the temperature of the fluid medium in the fluid passage. In the third step, the fluid sensor is placed in the fluid medium of the fluid passage, and the fluid sensor samples the flow rate of the fluid medium in real time. The fluid sensor has an inlet end and an outlet end, which are located on opposite sides of the fluid sensor. The fluid medium flows from the inlet end to the outlet end. During the flow, the fluid medium first contacts the inlet end, then flows through the fluid sensor, and finally flows out from the outlet end. The inlet end is a heating and temperature sensing end, and the outlet end is a temperature sensing end. There is a flow distance between the inlet and the outlet. The inlet can measure the temperature of the fluid medium flowing through it to obtain the inlet temperature value. The inlet can also heat the fluid medium, causing a temperature rise. The sum of the inlet temperature value and the temperature rise value is the superimposed temperature. The outlet can measure the temperature of the fluid medium flowing through it to obtain the outlet temperature value. The difference between the superimposed temperature and the outlet temperature value is the difference temperature. The cooling time required for the fluid medium to decrease this difference temperature is determined. Based on the cooling time and the flow distance, the flow velocity of the fluid medium flowing through the fluid sensor is obtained. The fluid sensor also includes a sensor controller. The inflow end and the outflow end are respectively connected to the sensor controller. The temperature rise value, the cooling time calculation program, and the flow distance are stored in the sensor controller. The inflow temperature value measured at the inflow end is transmitted to the sensor controller. The sensor controller controls the inflow end to heat the flowing fluid medium based on the temperature rise value, and calculates the superimposed temperature. The outflow temperature value measured at the outflow end is transmitted to the sensor controller, where the sensor controller calculates the difference temperature. The sensor controller determines the cooling time based on the difference temperature and the cooling time calculation program. The sensor controller derives the flow rate value based on the cooling time and the flow distance. The difference temperature corresponds to the cooling time calculation program. The inflow end includes an inflow end carrier plate, a first temperature sensor, and a heater, wherein the first temperature sensor and the heater are disposed on the inflow end carrier plate. The outflow end includes an outflow end carrier plate and a second temperature sensor, wherein the second temperature sensor is disposed on the outflow end carrier plate. The first temperature sensor, the heater, and the second temperature sensor are arranged sequentially from front to back in the flow direction of the fluid medium. The inflow and outflow carrier plates are inclinedly arranged in the flow direction of the fluid medium. The heater corresponds to the second thermometer. The first thermometer is used to measure the inflow temperature value. The heater heats the fluid medium flowing through it, so that the fluid medium has the temperature rise value. The second thermometer is used to measure the outflow temperature value.

2. The temperature control method as described in claim 1, characterized in that: The fluid sensor also includes an isolation conduction structure, in which the inflow end carrier plate and the outflow end carrier plate are embedded.

3. The temperature control method as described in claim 2, characterized in that: The fluid sensor also includes a sensor encapsulation cylinder, in which the isolation and conduction structure is filled. The fluid medium flows through both sides of the sensor encapsulation cylinder. The sensor encapsulation cylinder has a bottom and a side wall. The side wall is fixedly connected to the bottom of the cylinder. The bottom and the side wall surround each other to form a cavity. The isolation and conduction structure is disposed in the cavity.

4. The temperature control method as described in claim 3, characterized in that: The sidewall is recessed with a first temperature-measuring vortex cavity, a heating vortex cavity, and a second temperature-measuring vortex cavity. The first temperature-measuring vortex cavity corresponds to the first thermometer on the inflow end carrier plate, the heating vortex cavity corresponds to the heater on the inflow end carrier plate, and the second temperature-measuring vortex cavity corresponds to the second thermometer on the outflow end carrier plate. The fluid medium flowing from one side of the sensor encapsulation cylinder flows sequentially through the first temperature-measuring vortex cavity, the heating vortex cavity, and the second temperature-measuring vortex cavity. When the fluid medium flows through the first temperature-measuring vortex cavity, the first thermometer measures the temperature of the fluid medium. When the fluid medium flows through the heating vortex cavity, the heater heats the fluid medium. When the fluid medium flows through the second temperature-measuring vortex cavity, the second thermometer measures the temperature of the fluid medium.

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