Fresh air ventilator device based on external cold and heat sources

Abstract

The utility model discloses a fresh air ventilator device based on an external cold and heat source, which comprises a shell, and a fresh air channel is horizontally arranged in the shell; the air conditioner is characterized in that a pre-cooling and pre-heating heat exchanger is arranged in the fresh air channel close to the air inlet end along the cross section of the fresh air channel, the heat exchange water input end of the pre-cooling and pre-heating heat exchanger is outwards connected to a water inlet in the shell through a water inlet pipe, and the heat exchange water output end is outwards connected to a water outlet in the shell through a water outlet pipe; first air valves are arranged in parallel on the cross section of the fresh air channel where the pre-cooling and pre-heating heat exchanger is located; and a first air-refrigerant heat exchanger and a second air-refrigerant heat exchanger are arranged in the fresh air channel between the pre-cooling and pre-heating heat exchanger and the fan at intervals. The air conditioner can better utilize an external cold and heat source to assist in realizing indoor temperature adjustment, and has the advantages of being more energy-saving and consumption-saving, and being variable in controllable adjustment mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of residential temperature control adjustment, and specifically relates to a fresh air machine device based on additional cold and heat source. BACKGROUND

[0002] With the continuous improvement of living standards, people's health consciousness is getting stronger and stronger, outdoor air pollution and indoor decoration pollution, the urgent need of high quality indoor air to ensure people's health. Various factors form a trend and cognition, that is, the installation of fresh air system in high-end residential projects almost becomes a must.

[0003] At present, most fresh air machine control systems still adopt single temperature control strategy, that is, only when the outlet air temperature reaches the preset target value, the running is stopped. This control method not only has single function, but also is difficult to meet the diversified needs of users, and has obvious deficiency in energy utilization efficiency, cannot effectively integrate and utilize renewable energy, and is difficult to realize the goal of energy saving and environmental protection. The existing fresh air machine temperature control system is composed of proportional integral temperature controller, temperature sensor installed in the air supply pipe and electric regulating valve. The fresh air temperature is adjusted according to the set temperature value, the relative humidity cannot be adjusted, the experience is poor, some occasions cannot meet the requirements of the environment relative humidity, and a large amount of energy is consumed, which does not meet the current social requirements of energy saving, environmental protection and low carbon lifestyle. The target set temperature cannot be adjusted according to the real-time relative humidity of the environment, and the target parameters and working state of the fan cannot be adjusted in real time in combination with the current or future changing weather.

[0004] Groundwater, surface water, buried pipe, waste heat and cold and hot water prepared by equipment have significant advantages in energy utilization and environmental protection. The temperature of groundwater and surface water is relatively stable all the year round, showing the characteristics of "warm in winter and cool in summer". In summer, the temperature of groundwater is usually lower than that of air, which can provide efficient low-temperature cold source for air conditioning system and significantly reduce the load of condenser; in winter, the temperature of groundwater is higher than that of air, which can provide heat for the system and reduce the heating energy consumption. This stable temperature characteristic makes groundwater and surface water become ideal natural cold and heat source, which can effectively improve the energy utilization efficiency.

[0005] The buried pipe system realizes heat exchange by laying pipes underground. In summer, the buried pipe transmits indoor heat to the underground and uses the low temperature of soil for cooling; in winter, it absorbs heat from the soil to provide warmth for the indoor. The advantage of buried pipe system is that it is not affected by external temperature fluctuations, can run stably all the year round, and has high energy efficiency ratio, which further enhances the reliability and energy saving effect of the system.

[0006] Waste heat utilization is to recover industrial waste heat or waste heat discharged by equipment as a heat source of air conditioning system, which can greatly reduce the energy consumption of air conditioning system and improve the overall energy efficiency. And the utilization of waste heat is not limited by weather conditions, which can continuously and stably provide energy for air conditioning system, has high energy efficiency ratio, and can significantly improve the overall energy utilization rate.

[0007] Air conditioning equipment can extract heat or cold from outdoor air and transfer it to indoor air, making full use of renewable energy in the air and reducing dependence on traditional energy sources. With its unique working principle and efficient energy utilization mode, air conditioning equipment can provide efficient heating, cooling and hot water supply functions for buildings, significantly improve system energy efficiency, reduce energy consumption and achieve the goal of energy saving and environmental protection.

[0008] Therefore, if natural cold and heat sources such as geothermal energy, waste heat and air heat can be better utilized in combination with the air conditioning fresh air system, the load of the fresh air system can be better reduced, energy consumption can be reduced, and system energy consumption can be optimized. Practical new type content

[0009] In view of the above technical problems of the prior art, the technical problem to be solved by the present application is how to provide a fresh air machine device based on an external cold and heat source, which can better utilize an external cold and heat source to assist in realizing indoor temperature regulation and save energy.

[0010] In order to solve the above technical problems, the present application adopts the following technical solutions:

[0011] A fresh air machine device based on an external cold and heat source, comprising a shell, a fresh air channel horizontally arranged in the shell, an air inlet arranged at the air inlet end of the fresh air channel, and an air outlet arranged at the air outlet end; characterized in that a pre-cooling and pre-heating heat exchanger is arranged in the fresh air channel near the air inlet end along the cross section of the fresh air channel, a water heat exchange coil is arranged inside the pre-cooling and pre-heating heat exchanger and penetrates through both sides in the direction of air flow, the pre-cooling and pre-heating heat exchanger has a heat exchange water inlet end and a heat exchange water outlet end and is connected to both ends of the water heat exchange coil respectively, the heat exchange water inlet end is connected to the water inlet on the shell through a water inlet pipe, and the heat exchange water outlet end is connected to the water outlet on the shell through a water outlet pipe; a first air valve is also arranged on the cross section of the fresh air channel where the pre-cooling and pre-heating heat exchanger is arranged; a first air-refrigerant heat exchanger and a second air-refrigerant heat exchanger are also arranged in the fresh air channel between the pre-cooling and pre-heating heat exchanger and the fan;

[0012] The first air-refrigerant heat exchanger is provided with a first heat exchange medium coil, and the two sides of the first air-refrigerant heat exchanger are provided in sequence along the air flow direction. The first air-refrigerant heat exchanger is further provided with a second air valve in parallel on the cross section of the fresh air channel. One port of the first heat exchange medium coil is connected to the first air-refrigerant heat exchanger and connected to the first interface of a four-way reversing valve through a pipeline. The second interface and the third interface of the four-way reversing valve are respectively connected to the two ends of a compressor through a pipeline. The fourth interface of the four-way reversing valve is connected to the refrigerant inlet end of a water-refrigerant heat exchanger through a pipeline. The refrigerant outlet end of the water-refrigerant heat exchanger is connected back to the other port of the first air-refrigerant heat exchanger through a pipeline provided with an electromagnetic expansion valve, and a circulation is formed.

[0013] The refrigerant inlet end and the refrigerant outlet end of the water-refrigerant heat exchanger are connected to the internal refrigeration coil to form a circulation. The refrigeration coil is located in a water inlet cavity. The inlet of the water inlet cavity is connected to the water inlet pipe through a pipeline and a eighth three-way valve bypass. The outlet of the water inlet cavity is connected to the water outlet pipe through a pipeline and a ninth three-way valve bypass.

[0014] The second air-refrigerant heat exchanger is provided with a second heat exchange medium coil. The two sides of the second air-refrigerant heat exchanger are provided in sequence along the air flow direction. The second air-refrigerant heat exchanger is further provided with a third air valve in parallel on the cross section of the fresh air channel. One port of the second heat exchange medium coil is connected to the pipeline between the water-refrigerant heat exchanger and the electromagnetic expansion valve through a pipeline and a sixth three-way valve bypass. The other port of the second heat exchange medium coil is connected to the pipeline between the water-refrigerant heat exchanger and the four-way reversing valve through a pipeline and a seventh three-way valve bypass.

[0015] In this way, when the device is used, the water inlet and the water outlet are used to be connected to natural cold and heat sources such as surface water, underground water, buried pipes, waste heat, and cold and hot water prepared by the equipment. The cold and heat of the natural cold and heat sources can be used to reduce the load of the fresh air system and achieve the effect of energy saving and consumption reduction. At the same time, the pipeline connection mode between the first air-refrigerant heat exchanger and the second air-refrigerant heat exchanger in the fresh air machine enables the two heat exchangers to be converted between the evaporator function and the condenser function through the four-way reversing valve. Therefore, the control function mode of the fresh air machine can be further realized through control.

[0016] Further, a first electric two-way valve is installed on the water inlet pipe. A second electric two-way valve is installed on the pipeline between the water-refrigerant heat exchanger and the water inlet pipe. The first electric two-way valve, the second electric two-way valve, the electromagnetic expansion valve, the four-way reversing valve, the sixth three-way valve, the seventh three-way valve, the eighth three-way valve, the ninth three-way valve, the first air valve, the second air valve, and the third air valve are connected to the controller.

[0017] In this way, better control is facilitated.

[0018] Further, the fresh air channel is provided with a purification device at the air inlet end and an exhaust fan at the air outlet end.

[0019] In this way, the purification device realizes air inlet filtration, the fan ensures air supply effect, and the pre-cooling and pre-heating heat exchanger realizes temperature adjustment of the air inlet.

[0020] Further, the purification device is an ionization purification module and is connected to the controller. In this way, better control of the purification is achieved.

[0021] Further, the compressor is a variable frequency compressor. In this way, further better multi-stage adjustment of the dehumidification function is achieved.

[0022] Further, the fresh air channel is provided with a humidifier at the air outlet end, which is connected to the humidification inlet on the shell through the humidification pipe provided with a third electric two-way valve. In this way, the humidification function of the fresh air machine in winter is facilitated.

[0023] Further, the humidifier and the third electric two-way valve are respectively connected to the controller. In this way, control is more convenient.

[0024] Further, a first temperature probe and a first humidity probe are arranged in the fresh air channel near the air inlet, a second temperature probe and a second humidity probe are arranged near the air outlet, a fourth temperature probe is arranged in the water inlet pipe near the water inlet, and a fifth temperature probe is arranged in the water outlet pipe near the water outlet. The first temperature probe, the first humidity probe, the second temperature probe, the second humidity probe, the fourth temperature probe, and the fifth temperature probe are respectively connected to the controller. In this way, automatic detection control is more convenient.

[0025] Further, the controller is also provided with an API interface for connecting to a global weather data platform (OpenWeatherMap). In this way, the OpenWeatherMap platform can be connected through the API interface, and real-time weather data of a specified area, including temperature, air quality index (AQI), and relative humidity, etc. information can be automatically obtained, which assists in realizing automatic control.

[0026] The application can better utilize natural cold and heat sources, can be combined with an air conditioning system, and can efficiently transfer cold or heat to the air conditioning system through a heat exchanger, so that the function of pre-cooling or pre-heating is realized. In summer, natural cold and heat sources such as surface water, underground water, a ground buried pipe and cold and hot water prepared by equipment can provide stable low-temperature cold sources for the air conditioning system, and can significantly reduce the load of a condenser; in winter, the natural cold and heat sources can provide sufficient heat, and can effectively reduce heating energy consumption. Therefore, the applicant combines the natural cold and heat sources such as surface water, underground water, a ground buried pipe, waste heat and cold and hot water prepared by equipment with a fresh air fan system, fully utilizes the stable temperature characteristics of the natural cold and heat sources, and provides efficient pre-cooling or pre-heating functions for the fresh air fan. Through the integrated mode, the fresh air fan can utilize a low-temperature water source to reduce the supply air temperature in summer, and can utilize a warm water source to increase the supply air temperature in winter, so that the consumption of traditional energy is significantly reduced, the system energy efficiency is optimized, the operation energy consumption of the fresh air fan is greatly reduced, the indoor air conditioning comfort is effectively improved, carbon emissions are reduced, the sustainable development requirement of low-carbon environmental protection is better met, and an innovative solution is provided for green buildings and energy efficient utilization.

[0027] In conclusion, the utility model can better utilize external cold and heat sources to assist in realizing indoor temperature regulation, has the advantages of more energy-saving, consumption-reducing and controllable regulation modes. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a whole system structure schematic diagram of the utility model. The arrows in the figure represent the air direction. DETAILED DESCRIPTION

[0029] The utility model will be further explained in detail in combination with specific implementation manners.

[0030] Best embodiment: a fresh air fan device based on external cold and heat sources, referring to Figure 1 , including a shell 1, a fresh air channel 2 is horizontally arranged in the shell 1, an air inlet 12 is arranged at the air inlet end of the fresh air channel 2, and an air outlet 13 is arranged at the air outlet end; a pre-cooling and pre-heating heat exchanger 3 is arranged along the cross section of the fresh air channel close to the air inlet end in the fresh air channel 2, water heat exchange coils are arranged in the pre-cooling and pre-heating heat exchanger 3, and the water heat exchange coils are arranged through the two sides along the air flow direction; the pre-cooling and pre-heating heat exchanger 3 has a heat exchange water input end and a heat exchange water output end and is connected to the two ends of the water heat exchange coils respectively; the heat exchange water input end is connected to a water inlet 14 on the shell through a water inlet pipe; the heat exchange water output end is connected to a water outlet 15 on the shell through a water outlet pipe; a first air valve 10 is also arranged on the cross section of the fresh air channel where the pre-cooling and pre-heating heat exchanger 3 is arranged; a first air-refrigerant heat exchanger 7 and a second air-refrigerant heat exchanger 4 are also arranged in the fresh air channel between the pre-cooling and pre-heating heat exchanger 3 and the fan at intervals;

[0031] The first air-refrigerant heat exchanger 7 is provided with a first heat exchange medium coil (not shown in the figure), and the two sides of the first air-refrigerant heat exchanger 7 are provided in series along the air flow direction. The new air passage where the first air-refrigerant heat exchanger 7 is located is also provided with a second air valve 17 in parallel. One port of the first heat exchange medium coil is connected to the first air-refrigerant heat exchanger 7 through a pipeline and a first interface of a four-way reversing valve V5. The second interface and the third interface of the four-way reversing valve V5 are respectively connected to the two ends of a compressor 6 through pipelines. The fourth interface of the four-way reversing valve is connected to the refrigerant inlet end of a water-refrigerant heat exchanger 16 through a pipeline. The refrigerant outlet end of the water-refrigerant heat exchanger 16 is connected back to the other port of the first air-refrigerant heat exchanger 7 through a pipeline provided with an electromagnetic expansion valve V4, and forms a circulation.

[0032] The refrigerant inlet end and the refrigerant outlet end of the water-refrigerant heat exchanger 16 are connected to the internal refrigeration coil to form a circulation. The refrigeration coil is located in a water inlet cavity. The inlet of the water inlet cavity is connected to a water inlet pipe through a pipeline and an eighth three-way valve V8 in bypass. The outlet of the water inlet cavity is connected to a water outlet pipe through a pipeline and a ninth three-way valve V9 in bypass.

[0033] The second air-refrigerant heat exchanger 4 is provided with a second heat exchange medium coil (not shown in the figure). The two sides of the second air-refrigerant heat exchanger 4 are provided in series along the air flow direction. The new air passage where the second air-refrigerant heat exchanger 4 is located is also provided with a third air valve 11 in parallel. One port of the second heat exchange medium coil is connected to the pipeline between the water-refrigerant heat exchanger 16 and the electromagnetic expansion valve V4 through a pipeline and a sixth three-way valve V6 in bypass. The other port of the second heat exchange medium coil is connected to the pipeline between the water-refrigerant heat exchanger 16 and the four-way reversing valve V5 through a pipeline and a seventh three-way valve V7 in bypass.

[0034] The water inlet pipe is further provided with a first electric two-way valve V1. The pipeline between the water-refrigerant heat exchanger 16 and the water inlet pipe is further provided with a second electric two-way valve V2. The first electric two-way valve V1, the second electric two-way valve V2, the electromagnetic expansion valve V4, the four-way reversing valve V5, the sixth three-way valve V6, the seventh three-way valve V7, the eighth three-way valve V8, the ninth three-way valve V9, the first air valve 10, the second air valve 17, and the third air valve 11 are all connected to a controller.

[0035] The inlet end of the new air passage is provided with a purification device 8. The outlet end of the new air passage 2 is provided with an exhaust fan 5.

[0036] In this way, the purification device realizes air inlet filtration, the fan ensures the air supply effect, and the pre-cooling and pre-heating heat exchanger realizes temperature regulation of the air inlet.

[0037] The purification device 8 is an ionization purification module and is connected to the controller, so that the purification can be better controlled.

[0038] The compressor 6 is a variable frequency compressor, so that the multi-stage adjustment of the dehumidification function can be further better realized.

[0039] The fresh air channel outlet end is further provided with a humidifier 9, which is connected to the humidification inlet 18 on the shell through a humidification pipe provided with a third electric two-way valve V3. The humidifier 9 facilitates the humidification function of the fresh air machine in winter. In implementation, the humidifier 9 is a wet membrane humidifier.

[0040] The humidifier 9 and the third electric two-way valve V3 are connected to the controller, so that the control is more convenient.

[0041] The first temperature probe T1 and the first humidity probe RH1 are arranged near the air inlet in the fresh air channel, the second temperature probe T2 and the second humidity probe RH2 are arranged near the air outlet, the fourth temperature probe T4 is arranged near the water inlet in the water inlet pipe, and the fifth temperature probe T5 is arranged near the water outlet in the water outlet pipe. The first temperature probe T1, the first humidity probe RH1, the second temperature probe T2, the second humidity probe RH2, the fourth temperature probe T4 and the fifth temperature probe T5 are respectively connected to the controller. This is more convenient for automatic detection control.

[0042] The controller is further provided with an API interface for connecting to a global weather data platform (OpenWeatherMap). This facilitates the connection of the OpenWeatherMap platform through the API interface, which can automatically obtain real-time weather data of a specified area, including temperature, air quality index (AQI) and relative humidity, to assist in automatic control.

[0043] Thus, when the device is used, the water inlets and outlets are connected to natural cold and heat sources such as surface water, underground water, buried pipes, waste heat and cold and hot water prepared by the equipment to form a water circulation. When the underground water is used as a natural cold and heat source, it can provide cold water precooling for the preheating heat exchanger in summer and hot water preheating in winter, so that the natural cold and heat sources can be used to reduce the load of the fresh air system and achieve energy saving and consumption reduction. The connection mode of the pipes between the first air-refrigerant heat exchanger and the second air-refrigerant heat exchanger in the fresh air machine allows the two heat exchangers to be controlled by the four-way switching control valve to switch between the evaporator function and the condenser function. Therefore, the fresh air machine can further realize various control function modes through control. Specifically, the following modes are included

[0044] In summer, the following modes are included.

[0045] Direct cooling mode:

[0046] When the outdoor air temperature T a ≥ Low temperature cold source temperature T c +x (the determination of x can comprehensively consider system design objectives, thermodynamic efficiency, economy, water source characteristics, and application scenarios), outdoor air temperature T a >T s When setting the temperature, the outdoor relative humidity φ must be less than or equal to the upper limit of the set humidity φ. max The fresh air unit is set to direct cooling mode. Purification device 8 is activated when the regional air pollution index (AQI) is greater than 100; otherwise, it is deactivated. The first air valve 10 is closed, the first electric two-way valve V1 is opened, and the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted. Cold water only enters the pre-cooling and preheating heat exchanger 3 to pre-treat the fresh air. The third air valve 11 and the second air valve 17 are opened, and the exhaust fan 5 is activated. Fresh air is then delivered into the room through the air outlet, at which point the delivered air meets the indoor temperature and humidity requirements.

[0047] Direct cooling dehumidification and temperature reduction mode:

[0048] When the outdoor air temperature T a ≥ Low temperature cold source temperature T c Outdoor air temperature T a ≥T s When setting the temperature, the outdoor relative humidity φ must be less than or equal to the upper limit of the set humidity φ. max The fresh air system activates direct cooling dehumidification and temperature reduction mode. Purification device 8 is activated when the Air Pollution Index (AQI) is greater than 100; otherwise, it is deactivated. Open the first electric two-way valve V1, adjust the eighth three-way valve V8 and the ninth three-way valve V9, and cold water is introduced into the pre-cooling and preheating heat exchanger 3 and the water-refrigerant heat exchanger 16. Close the first air valve 10, and the pre-cooling and preheating heat exchanger 3 pre-treats the fresh air. Close the second air valve 17, start the compressor 6, adjust the four-way reversing valve V5, open the electromagnetic expansion valve V4, and adjust the sixth three-way valve V6 and the seventh three-way valve V7. At this time, the first air-refrigerant heat exchanger 7 acts as an evaporator, and the water-refrigerant heat exchanger 16 acts as a condenser. Open the second electric two-way valve V2, and low-temperature cold water is introduced to remove excess heat from the condenser. The first air-refrigerant heat exchanger 7, acting as an evaporator, cools and dehumidifies the fresh air. Open the third air valve 11, start the exhaust fan 5, and the fresh air is sent into the room through the air outlet. At this time, the fresh air supplied just meets the indoor heat and humidity requirements.

[0049] Constant temperature dehumidification mode:

[0050] When the outdoor air temperature T a ≥ Low temperature cold source temperature T c Outdoor air temperature T a =Set temperature T s±Δt, and the outdoor air relative humidity φ > the set humidity upper limit φ max , the fresh air machine opens the cooling and dehumidifying mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise the purification device 8 is closed. The first electric two-way valve V1 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, cold water is introduced into the pre-cooling and pre-heating heat exchanger 3 and the water-refrigerant heat exchanger 16, the first air valve 10 is closed, the pre-cooling and pre-heating heat exchanger 3 pre-processes the fresh air, the third air valve 11 and the second air valve 17 are closed, the compressor 6 is opened, the four-way reversing valve V5 is adjusted, the electromagnetic expansion valve V4 is opened, the sixth three-way valve V6 and the seventh three-way valve V7 are adjusted, at this time the first air-refrigerant heat exchanger 7 is an evaporator, the second air-refrigerant heat exchanger 4 is a condenser, and the water-refrigerant heat exchanger 16 is a condenser, the second electric two-way valve V2 is opened, low-temperature cold water is introduced to take away the excess heat of the condenser, the first air-refrigerant heat exchanger 7 as an evaporator cools and dehumidifies the fresh air, and the condenser warms up the fresh air, considering the heat generated by equipment and machines, the excess heat is exchanged with underground water by the water-refrigerant heat exchanger 16, and the exhaust fan 5 is opened, the fresh air is sent into the room through the air supply port, at this time the fresh air sent in just meets the heat and humidity requirements of the room.

[0051] Cooling and dehumidifying mode:

[0052] The outdoor air temperature T a < The low-temperature cold source temperature T c The outdoor air temperature T a ≥T s The set temperature, and the outdoor air relative humidity φ > the set humidity upper limit φ max , the fresh air machine opens the cooling and dehumidifying mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise the purification device 8 is closed. The eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, cold water is introduced into the water-refrigerant heat exchanger 16, the first air valve 10 is opened, the second air valve 17 is closed, the compressor 6 is opened, the four-way reversing valve V5 is adjusted, the electromagnetic expansion valve V4 is opened, the sixth three-way valve V6 and the seventh three-way valve V7 are adjusted, at this time the first air-refrigerant heat exchanger 7 is an evaporator, the water-refrigerant heat exchanger 16 is a condenser, the second electric two-way valve V2 is opened, low-temperature cold water is introduced to take away the excess heat of the condenser, the first air-refrigerant heat exchanger 7 as an evaporator cools and dehumidifies the fresh air, the third air valve 11 is opened, the exhaust fan 5 is opened, the fresh air is sent into the room through the air supply port, at this time the fresh air sent in just meets the heat and humidity requirements of the room.

[0053] Ventilation and purification mode:

[0054] When the outdoor air temperature T a = the set temperature T s ±Δt, the set humidity lower limit φmin < Outdoor air relative humidity φ < Set humidity upper limit φ max The fresh air fan opens the ventilation and purification mode. The purification device 8 can be opened when the air pollution index AQI is greater than 100, otherwise it is closed. According to the indoor CO2 sensor, the concentration of indoor CO2 is monitored. If the indoor CO2 exceeds the specified concentration, the exhaust fan 5 is opened at this time, and the fresh air is introduced to dilute the concentration of CO2, so as to ensure the indoor air quality. If the indoor CO2 sensor monitors that the CO2 does not exceed the specified concentration, the fresh air fan is closed at this time.

[0055] The following modes can be run in winter.

[0056] Direct heating mode:

[0057] When the outdoor air temperature T a ≤ Heat source temperature T h - When the outdoor air temperature T a ≤ T s Set temperature, and the outdoor air relative humidity φ ≥ Set humidity lower limit φ min , the fresh air fan opens the direct heating mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise it is closed. The first air valve 10 is closed, the first electric two-way valve V1 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, the pre-cooling and pre-heating heat exchanger 3 is started, and the pre-cooling and pre-heating heat exchanger 3 is pre-heated. The new air is treated, the third air valve 11 and the second air valve 17 are opened, the exhaust fan 5 is opened, the fresh air is sent into the room through the air supply port. At this time, the wind sent into the room can just meet the indoor heat and humidity demand.

[0058] Heating mode:

[0059] When the outdoor air temperature T a ≥ Heat source temperature T h + X, the outdoor air temperature T a ≤ T s Set temperature, and the outdoor air relative humidity φ ≥ Set humidity lower limit φ min, the fresh air machine opens the heating mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise the purification device 8 is closed. The first air valve 10 is opened, the second air valve 17 is closed, the compressor 6 is opened, the four-way reversing valve V5 is adjusted, the electromagnetic expansion valve V4 is opened, the sixth three-way valve V6 and the seventh three-way valve V7 are adjusted, at this time the first air-refrigerant heat exchanger 7 is a condenser, the water-refrigerant heat exchanger 16 is an evaporator, the first air-refrigerant heat exchanger 7 as a condenser performs heating treatment on fresh air, the second electric two-way valve V2 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, hot water is introduced to exchange heat with the water-refrigerant heat exchanger 16 as an evaporator, the third air valve 11 is opened, the exhaust fan 5 is opened, and the fresh air is sent into the room through the air supply port. At this time, the fresh air sent in just meets the indoor heat and humidity requirements.

[0060] Direct heating mode:

[0061] When the outdoor air temperature T a ≤ hot source temperature T h , and the outdoor air relative humidity φ ≥ relative humidity lower limit φ a ≤ T s , and the outdoor air relative humidity φ ≥ relative humidity lower limit φ min , the fresh air machine opens the direct heating mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise the purification device 8 is closed. The first air valve 10 is opened, the second air valve 17 is closed, the compressor 6 is opened, the four-way reversing valve V5 is adjusted, the electromagnetic expansion valve V4 is opened, the sixth three-way valve V6 and the seventh three-way valve V7 are adjusted, at this time the first air-refrigerant heat exchanger 7 is a condenser, the water-refrigerant heat exchanger 16 is an evaporator, the first air-refrigerant heat exchanger 7 as a condenser performs heating treatment on fresh air, the second electric two-way valve V2 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, hot water is introduced to exchange heat with the water-refrigerant heat exchanger 16 as an evaporator, the third air valve 11 is opened, the exhaust fan 5 is opened, and the fresh air is sent into the room through the air supply port. At this time, the fresh air sent in just meets the indoor heat and humidity requirements.

[0062] Direct heating and humidification mode:

[0063] When the outdoor air temperature T a ≤ hot source temperature T h -x, when the outdoor air temperature T a ≤ T s , and the outdoor air relative humidity φ < relative humidity lower limit φ min, the fresh air machine opens the direct heating and humidification mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise it is closed. The first air valve 10 is closed, the first electric two-way valve V1 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, the pre-cooling and pre-heating heat exchanger 3 is started, the pre-cooling and pre-heating heat exchanger 3 pre-heats the fresh air, the third air valve 11 and the second air valve 17 are opened, the third electric two-way valve V3 is opened, the humidifier 9 is started, the fresh air is humidified, the exhaust fan 5 is opened, and the fresh air is sent into the room through the air outlet. At this time, the fresh air sent in just meets the indoor heat and humidity requirements.

[0064] Heating and humidification mode:

[0065] When the outdoor air temperature T a ≥ heat source temperature T h +x, the outdoor air temperature T a ≤T s set temperature, and the outdoor air relative humidity φ < relative humidity lower limit φ min , the fresh air machine opens the heating and humidification mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise it is closed. The first air valve 10 and the third air valve 11 are opened, the second air valve 17 is closed, the compressor 6 is opened, the four-way reversing valve V5 is adjusted, the electromagnetic expansion valve V4 is opened, the sixth three-way valve V6 and the seventh three-way valve V7 are adjusted, at this time the first air-refrigerant heat exchanger 7 is a condenser, the water-refrigerant heat exchanger 16 is an evaporator, the first air-refrigerant heat exchanger 7 as a condenser heats the fresh air, the second electric two-way valve V2 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, hot water is introduced and exchanged with the water-refrigerant heat exchanger 16 as an evaporator, the third electric two-way valve V3 is opened, the humidifier 9 is started, the fresh air is humidified, the exhaust fan 5 is opened, and the fresh air is sent into the room through the air outlet. At this time, the fresh air sent in just meets the indoor heat and humidity requirements.

[0066] Direct heating and humidification mode:

[0067] When the outdoor air temperature T a < heat source temperature T h , when the outdoor air temperature T a ≤T s set temperature, and the outdoor air relative humidity φ < relative humidity lower limit φ min, the fresh air machine opens the direct heating and humidification mode. When the air pollution index AQI is greater than 100, the purification device 8 is opened, otherwise the purification device 8 is closed. The third air valve 11 is opened, the first air valve 10 is closed, the first electric two-way valve V1 is opened, the eighth three-way valve V8 and the ninth three-way valve V9 are adjusted, the pre-cooling and pre-heating heat exchanger 3 is started, the pre-cooling and pre-heating heat exchanger 3 performs pre-heating treatment on the fresh air, the second air valve 17 is closed, the compressor 6 is opened, the four-way reversing valve V5 is adjusted, the electromagnetic expansion valve V4 is opened, the sixth three-way valve V6 and the seventh three-way valve V7 are adjusted, at this time the first air-refrigerant heat exchanger 7 is a condenser, the water-refrigerant heat exchanger 16 is an evaporator, the condenser 7 performs heating treatment on the fresh air, the second electric two-way valve V2 is opened, hot water is introduced and exchanges heat with the water-refrigerant heat exchanger 16 as an evaporator, the third electric two-way valve V3 is opened, the humidifier 9 is started, and the fresh air is humidified, the exhaust fan 5 is opened, the fresh air is sent into the room through the air outlet, and at this time the fresh air sent in just meets the indoor heat and humidity requirements.

[0068] Shutdown:

[0069] When the outdoor air temperature T a ≤T w shutdown temperature, at this time the centralized controller controls the fresh air machine to stop.

Claims

1. An outdoor air machine device based on an additional cold and hot source, comprising a shell, a fresh air channel is arranged horizontally in the shell, an air inlet is arranged at the air inlet end of the fresh air channel, and an air outlet is arranged at the air outlet end; characterized in that, The pre-cooling and pre-heating heat exchanger is arranged along the cross section of the fresh air channel near the air inlet end, and water heat exchange coils are arranged inside the pre-cooling and pre-heating heat exchanger and penetrate through the two sides along the air flow direction, the pre-cooling and pre-heating heat exchanger has a heat exchange water input end and a heat exchange water output end and is connected to the water heat exchange coils at both ends respectively, the heat exchange water input end is connected to the water inlet of the outer shell through the water inlet pipe, and the heat exchange water output end is connected to the water outlet of the outer shell through the water outlet pipe; a first air valve is also arranged on the cross section of the fresh air channel where the pre-cooling and pre-heating heat exchanger is arranged; a first air-refrigerant heat exchanger and a second air-refrigerant heat exchanger are also arranged in the fresh air channel between the pre-cooling and pre-heating heat exchanger and the fan; The first air-refrigerant heat exchanger is provided with first heat exchange medium coils, the two sides of the first air-refrigerant heat exchanger are penetrated through along the air flow direction, a second air valve is also arranged on the cross section of the fresh air channel where the first air-refrigerant heat exchanger is arranged, one port of the first heat exchange medium coils is connected to the first air-refrigerant heat exchanger and connected to the first interface of a four-way reversing valve through a pipeline, the second interface and the third interface of the four-way reversing valve are connected to the two ends of a compressor through pipelines respectively, the fourth interface of the four-way reversing valve is connected to the refrigerant inlet end of a water-refrigerant heat exchanger through a pipeline, and the refrigerant outlet end of the water-refrigerant heat exchanger is connected back to the other port of the first air-refrigerant heat exchanger through a pipeline provided with an electromagnetic expansion valve and forms a circulation; The refrigeration coils are connected to the refrigerant inlet end and the refrigerant outlet end of the water-refrigerant heat exchanger to form a circulation, and the refrigeration coils are located in a water inlet cavity, the inlet of the water inlet cavity is connected to the water inlet pipe through a pipeline and a eighth three-way valve bypass, and the outlet of the water inlet cavity is connected to the water outlet pipe through a pipeline and a ninth three-way valve bypass; The second air-refrigerant heat exchanger is provided with second heat exchange medium coils, the two sides of the second air-refrigerant heat exchanger are penetrated through along the air flow direction, a third air valve is also arranged on the cross section of the fresh air channel where the second air-refrigerant heat exchanger is arranged, one port of the second heat exchange medium coils is connected to the pipeline between the water-refrigerant heat exchanger and the electromagnetic expansion valve through a pipeline and a sixth three-way valve bypass, and the other port of the second heat exchange medium coils is connected to the pipeline between the water-refrigerant heat exchanger and the four-way reversing valve through a pipeline and a seventh three-way valve bypass.

2. The fresh air handling unit based on an external cold and heat source as described in claim 1, characterized in that, A first electric two-way valve is also arranged on the water inlet pipe, a second electric two-way valve is also arranged on the pipeline between the water-refrigerant heat exchanger and the water inlet pipe, and the first electric two-way valve, the second electric two-way valve, the electromagnetic expansion valve, the four-way reversing valve, the sixth three-way valve, the seventh three-way valve, the eighth three-way valve, the ninth three-way valve, the first air valve, the second air valve and the third air valve are connected to the controller.

3. The device of claim 1, wherein the device is configured to operate in a cooling mode and a heating mode. The air inlet end of the fresh air channel is provided with a purification device, and the air outlet end of the fresh air channel is provided with an exhaust fan.

4. The fresh air handling unit based on an external cold and heat source as described in claim 3, characterized in that, The purification device is an ionization purification module and is connected to the controller.

5. The cold heat source based fresh air machine device of claim 1, wherein, The compressor is a variable frequency compressor.

6. The cold heat source based fresh air machine device of claim 1, wherein, The fresh air passage outlet end is further provided with a humidifier connected with a humidifying inlet on the shell through a humidifying pipe provided with a third electric two-way valve.

7. The fresh air handling unit based on an external cold and heat source as described in claim 6, characterized in that, The humidifier and the third electric two-way valve are respectively connected with the controller.

8. The cold heat source based fresh air machine device of claim 1, wherein, A first temperature probe and a first humidity probe are arranged in the fresh air passage close to the air inlet, a second temperature probe and a second humidity probe are arranged close to the air outlet, a fourth temperature probe is arranged in the water inlet pipe close to the water inlet, and a fifth temperature probe is arranged in the water outlet pipe close to the water outlet.

9. The fresh air handling unit based on an external cold and heat source as described in claim 8, characterized in that, The controller is further provided with an API interface connected with a global weather data platform.

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