CN216953235U - A fresh air conditioner - Google Patents

Abstract

The utility model provides a fresh air air conditioner, comprising: a fresh air inlet, an exhaust air inlet, an exhaust air outlet, a fresh air outlet, a heat exchange core, a fresh air passage and a fresh air bypass passage, and the fresh air inhaled through the fresh air inlet can enter the In the fresh air passage, heat is exchanged with the exhaust air entering through the exhaust air inlet at the heat exchange core, and the fresh air inhaled through the fresh air inlet can also enter the fresh air bypass passage, so The airflow in the fresh air bypass channel directly enters the room through the fresh air outlet without passing through the heat exchange core for heat exchange. According to the utility model, the fresh air bypass channel does not exchange heat with the heat exchange core, so that it is unnecessary to flow through the heat exchange core when the temperature difference between the outdoor fresh air and the indoor exhaust air is small. Heat exchange, thereby effectively reducing the load when no fresh air heat exchange is required, reducing wind resistance and improving the life of the system.

Description

A fresh air conditioner

technical field

The utility model relates to the technical field of compressors, in particular to a fresh air air conditioner.

Background technique

With the introduction of the national "dual carbon" strategy and the implementation of energy conservation and emission reduction policies, and the frequent occurrence of dust and haze weather in recent years, people have put forward higher requirements for indoor air environment. In order to meet people's demand for a healthier and more comfortable indoor air environment, there are indoor air treatment equipment on the market.

The existing indoor air treatment equipment mainly includes fresh air haze removal machines, fresh air ventilators, and air purifiers. Some of these devices are only for the exchange and heat recovery of indoor and outdoor air, some realize the function of filtering the air, and the air purifier mainly purifies the indoor air. These devices have a single function and cannot have the functions of cooling, heating, energy recovery or bypass at the same time, and the energy saving effect is not significant, or they need to be used together with traditional air conditioners, and repeated installations waste manpower and material resources.

Since the fresh air air conditioning system in the prior art has technical problems such as high load when the fresh air heat exchange is not required, resulting in no energy saving and affecting the life of the system, the utility model researches and designs a fresh air air conditioner.

Utility model content

Therefore, the technical problem to be solved by the present invention is to overcome the defects of the fresh air air conditioning system in the prior art that when the fresh air heat exchange is not required, the load is relatively high, resulting in no energy saving and affecting the life of the system, thereby providing a fresh air air conditioner. machine.

In order to solve the above-mentioned problems, the utility model provides a fresh air air conditioner, which comprises:

Fresh air inlet, exhaust air inlet, exhaust air outlet, fresh air outlet, heat exchange core, fresh air passage and fresh air bypass passage, the fresh air inhaled through the fresh air inlet can enter the fresh air passage, and pass through the exhaust air. The exhaust air entering the inlet exchanges heat at the heat exchange core, and the fresh air sucked in through the fresh air inlet can also enter the fresh air bypass passage, and the airflow in the fresh air bypass passage does not pass through the fresh air bypass passage. The heat exchange core body exchanges heat and directly enters the room through the fresh air outlet.

In some embodiments, an exhaust chamber is further included, the exhaust chamber communicates with the exhaust inlet, the fresh air passage can communicate with the fresh air inlet, and the heat exchange core is located in the fresh air between the passage and the exhaust air chamber, so that the fresh air in the fresh air passage and the exhaust air in the exhaust air chamber exchange heat at the heat exchange core;

In addition, the fresh air bypass passage can also be communicated with the fresh air inlet, and the heat exchange core does not perform heat exchange on the fresh air bypass passage.

In some embodiments, the fresh air passage is arranged in the exhaust chamber, the fresh air bypass passage is also arranged in the exhaust chamber, and the fresh air passage is connected with the fresh air bypass passage, In addition, the heat exchange core body is only in contact with the fresh air passage for heat exchange; the exhaust air outlet is communicated with the exhaust air chamber, and an exhaust fan is also arranged in the exhaust air chamber.

In some embodiments, a fresh air chamber is further included, the fresh air chamber is communicated and arranged between the fresh air inlet and the fresh air passage or the fresh air bypass passage, and one end of the fresh air chamber is communicated with the fresh air inlet , the other end is communicated with the fresh air passage or the fresh air bypass passage; and the interior of the fresh air chamber is also provided with a fresh air filter and the fresh air preheating device, along the airflow direction, the fresh air entering the fresh air inlet It can flow through the fresh air filter and the fresh air preheating device in sequence.

In some embodiments, the fresh air chamber is further provided with a first filter, and the first filter is provided between the fresh air filter and the fresh air inlet;

A second filter is also provided at the exhaust air inlet, so as to filter the indoor exhaust air sucked by the exhaust air inlet.

In some embodiments, a fresh air damper is further included, the fresh air damper can control the opening or closing of the fresh air passage, and the fresh air damper can also control the opening or closing of the fresh air bypass passage;

The fresh air damper further includes a fresh air damper motor, a fresh air scavenging blade, a fresh air bypass vent valve motor and a fresh air bypass scavenging blade, the fresh air scavenging blade is located in the fresh air passage, and the fresh air bypass swept The blades are located in the fresh air bypass passage, the fresh air damper motor can control the movement of the fresh air sweeping blades to open or close the fresh air passage, and the fresh air bypass valve motor can control the fresh air bypass sweeping The vanes move to open or close the fresh air bypass passage.

In some embodiments, an inner circulation chamber, an inner circulation air inlet and an inner circulation damper are further included, the inner circulation air inlet is communicated with the inner circulation chamber, and one end of the inner circulation chamber is further connected to the inner circulation chamber. The fresh air passage and the fresh air bypass passage are respectively communicated, and the other end of the inner circulation chamber is also communicated with the fresh air outlet, and the inner circulation air valve can control the opening or closing of the inner circulation air inlet.

In some embodiments, a third filter is further provided at the downstream end of the airflow of the inner circulating air inlet,

A fresh air fan and a heat exchanger are arranged in the inner circulation chamber, and the fresh air outlet leads to the room;

A fresh air temperature and humidity sensor and a carbon dioxide sensor are also arranged in the inner circulation chamber; the fresh air air conditioner further includes an electric controller.

In some embodiments, the fresh air fan includes a fresh air motor, a first fresh air volute and a second fresh air volute, and the fresh air motor can be connected to the first fresh air volute and the second fresh air volute at the same time.

The utility model also provides a control method for the fresh air air conditioner as described in any one of the preceding items, which comprises:

The detection step is to detect the indoor carbon dioxide concentration C, the _indoor ambient temperature T and the _outdoor ambient temperature T;

Judging step, judging the relationship between carbon dioxide concentration C and set concentration A, judging the relationship between indoor ambient temperature T and _{indoor set} temperature T, and judging the relationship between _outdoor ambient temperature T and _indoor ambient temperature T Relationship;

The control step is based on the relationship between the carbon dioxide concentration C and the set concentration A, the relationship between the indoor ambient temperature T _and the indoor _set temperature T, and the relationship between the _outdoor ambient temperature T and the _indoor ambient temperature T , controlling the fresh air air conditioner to execute one of the fresh air mode, the mixed air mode, the internal circulation mode and the fresh air bypass mode.

In some embodiments, when the exhaust fan, the fresh air damper motor, the fresh air bypass vent valve motor and the internal circulation damper are simultaneously included:

In the judging step, the judgment condition 1 is C≥A, the judgment condition 2 is -T1≤Tin _{- Tset≤T1} , and the judgment condition 3 is- _{T2≤Tout -} Tin≤T2;

In the control step, if the judgment condition 1 is not satisfied, control to close the exhaust fan and the motor of the fresh air damper, close the motor of the fresh air bypass vent valve, open the internal circulation damper, and operate the internal circulation mode;

When it is judged that the judgment condition 1 is met; and when the judgment condition 2 is not met, control to open the fresh air damper motor, close the fresh air bypass ventilation valve motor, open the internal circulation damper, open the exhaust fan, and run the mixed air mode ;

When the judgment condition 1, the judgment condition 2, and the judgment condition 3 are satisfied at the same time, the control is to close the internal circulation damper, turn off the fresh air damper motor, turn on the fresh air bypass ventilation valve motor, turn on the exhaust fan, and run the fresh air bypass. model;

When the judgment condition 1 is met at the same time, the judgment condition 2 is met, and the judgment condition 3 is not met, the control is to close the internal circulation damper, turn on the motor of the fresh air damper, turn off the motor of the fresh air bypass ventilation valve, turn on the exhaust fan, and run the fresh air. model;

A is the set carbon dioxide concentration value, T1 is the first set temperature value, and T2 is the second set temperature value.

In some embodiments, A ranges from 900 to 1100 PPM, T1 ranges from 1°C to 3°C, and T2 ranges from 2°C to 5°C.

In some embodiments, when also comprising a fresh air preheating device:

The judging step can also judge whether the judgment condition 4 is satisfied: T _ring <T3;

In the control step, if the determination condition 4 is satisfied, the fresh air preheating device is turned on, and if the determination condition 4 is not satisfied, the fresh air preheating device 4 is turned off, wherein the T _ring is the outdoor ambient temperature, and T3 is the third set temperature.

The fresh air conditioner provided by the utility model has the following beneficial effects:

1. The utility model can introduce fresh air from the outdoors to the indoor through the fresh air inlet and the fresh air outlet opened on the fresh air air conditioner, and can introduce the gas from the indoor and discharge it to the outdoors through the exhaust air inlet and the exhaust outlet, effectively completing the indoor and outdoor fresh air. The exchange of air flow and dirty air flow, and by setting the heat exchange core, the fresh air passage and the fresh air bypass passage, the outdoor fresh air can exchange heat with the indoor exhaust air through the heat exchange core when entering the fresh air passage, and can be used outdoors. When the temperature difference between the fresh air and the indoor fresh air is large, the indoor exhaust air is used to transfer a certain amount of heat or cold to the outdoor fresh air, which can effectively recover the energy of the indoor exhaust air (mainly heat recovery). It achieves a good energy-saving effect while maintaining air quality; it can also pass through the fresh air bypass channel, and the fresh air bypass channel does not exchange heat with the heat exchange core, so that the temperature difference between the outdoor fresh air and the indoor exhaust air is small. In this case, it is not necessary to flow through the heat exchange core for heat exchange, thereby effectively reducing the load when no fresh air heat exchange is required, reducing wind resistance and improving the life of the system;

2. A fresh air environmental control integrated machine provided by the utility model can realize fresh air mode, mixed air mode, internal circulation mode, fresh air bypass mode, etc., and has heating, cooling, air purification, fresh air ventilation and bypass mode. It can adjust different functions according to the environmental requirements, and prepare the energy recovery function, which can effectively improve the indoor air quality and achieve a good energy saving effect. 5 parameter status, and make effective adjustment.

Description of drawings

Fig. 1 is the overall internal structure schematic diagram of the fresh air air conditioner of the utility model;

Fig. 2 is A-A sectional view in Fig. 1;

Fig. 3 is the B-B sectional view in Fig. 1;

Fig. 4 is the gas flow path diagram of the fresh air air conditioner of the utility model under the fresh air mode;

Fig. 5 is the gas flow path diagram of the fresh air air conditioner of the utility model under the mixed air mode;

Fig. 6 is the gas flow path diagram of the fresh air conditioner of the utility model under the internal circulation mode;

Fig. 7 is the gas flow path diagram of the fresh air air conditioner of the utility model under the fresh air bypass mode;

Fig. 8 is the control method flow chart of the fresh air air conditioner of the utility model;

9 is a schematic diagram of the overall internal structure of the fresh air air conditioner of the present utility model (alternative embodiment 1);

Fig. 10 is the A-A sectional view in Fig. 9 of the utility model (alternative embodiment one);

Fig. 11 is the A-A screenshot of the alternative embodiment two of the present utility model;

Fig. 12 is the B-B screenshot of the alternative embodiment two of the present utility model;

Fig. 13 is the A-A screenshot of the alternative embodiment three of the present utility model;

FIG. 14 is a B-B screenshot of the third alternative embodiment of the present invention.

Reference numerals are indicated as:

1. Fresh air inlet; 2. The first filter; 3. Fresh air filter; 4. Fresh air preheating device; 5. Exhaust air inlet; 6. The second filter; 7. Internal circulating air inlet; 8. Internal circulating air Valve; 9. The third filter; 10. Fresh air temperature and humidity sensor; 11. Exhaust air outlet; 12. Exhaust fan; 13. Electric controller; 14. Heat exchange core; 15. Fresh air damper; 16. Carbon dioxide Sensor; 17, fresh air fan; 18, heat exchanger; 19, fresh air outlet; 151, fresh air damper motor; 152, fresh air bypass valve motor; 171, first fresh air volute; 172, fresh air motor; 173, second Fresh air volute; 100, fresh air passage; 200, fresh air bypass passage; 300, exhaust chamber; 400, fresh air chamber; 500, internal circulation chamber.

Detailed ways

As shown in Figures 1-14, the utility model provides a fresh air air conditioner, which includes:

The fresh air inlet 1, the exhaust air inlet 5, the exhaust air outlet 11, the fresh air outlet 19, the heat exchange core 14, the fresh air passage 100 and the fresh air bypass passage 200, the fresh air inhaled through the fresh air inlet 1 can enter the fresh air passage 100 The heat exchange is performed at the heat exchange core 14 with the exhaust air entering through the exhaust air inlet 5, and the fresh air inhaled through the fresh air inlet 1 can also enter the fresh air bypass passage 200, The airflow in the fresh air bypass passage 200 directly enters the room through the fresh air outlet 19 without passing through the heat exchange core 14 for heat exchange.

The utility model can introduce fresh air from the outdoors to the indoor through the fresh air inlet and the fresh air outlet opened on the fresh air air conditioner, and can introduce the gas from the indoor and discharge it to the outdoors through the exhaust air inlet and the air outlet, so as to effectively complete the indoor and outdoor fresh air flow and the air flow. The exchange of dirty airflow, and by setting the heat exchange core, the fresh air channel and the fresh air bypass channel, the outdoor fresh air can exchange heat with the indoor exhaust air through the heat exchange core when entering the fresh air channel. When the indoor fresh air temperature difference is large, the indoor exhaust air is used to transfer a certain amount of heat or cold to the outdoor fresh air, which can effectively recover the energy of the indoor exhaust air (mainly heat recovery), and has the function of energy recovery, which can effectively improve the indoor air quality. At the same time, it achieves a good energy saving effect; it can also pass through the fresh air bypass channel, and the fresh air bypass channel does not exchange heat with the heat exchange core, so that the temperature difference between the outdoor fresh air and the indoor exhaust air is small. It is no longer necessary to pass through the heat exchange core for heat exchange, thereby effectively reducing the load when no fresh air heat exchange is required, reducing wind resistance and improving the life of the system.

The utility model provides a fresh air environmental control integrated machine, which can realize a fresh air mode, a mixed air mode, an internal circulation mode, a fresh air bypass mode, etc., and has functions such as heating, cooling, air purification, fresh air ventilation and bypass. , Different functions can be adjusted according to environmental requirements, and the energy recovery function can be used to effectively improve indoor air quality while achieving a good energy-saving effect. The energy-saving effect is remarkable, and it can also monitor indoor temperature and humidity, CO2 concentration, PM2. status and make effective adjustments.

In some embodiments, an exhaust chamber 300 is further included, the exhaust chamber 300 communicates with the exhaust inlet 5, and the fresh air passage 100 can communicate with the fresh air inlet 1, and the heat exchange core The body 14 is located between the fresh air passage 100 and the exhaust air chamber 300 , so that the fresh air in the fresh air passage 100 and the exhaust air in the exhaust air chamber 300 are at the heat exchange core 14 heat exchange;

In addition, the fresh air bypass passage 200 can also communicate with the fresh air inlet 1 , and the heat exchange core 14 does not perform heat exchange on the fresh air bypass passage 200 .

The utility model can also introduce indoor air from the exhaust air inlet by setting the air exhaust chamber, the fresh air passage is connected with the fresh air inlet to inhale the outdoor fresh air, and the heat exchange core body can make the heat exchange between the fresh air passage and the air exhaust chamber, The fresh air bypass channel is connected with the fresh air inlet to inhale fresh air, but the fresh air bypass channel will not allow the airflow to pass through the heat exchange core to exchange heat, which can effectively reduce wind resistance and improve energy efficiency.

In some embodiments, the fresh air passage 100 is arranged in the exhaust chamber 300, the fresh air bypass passage 200 is also arranged in the exhaust chamber 300, and the fresh air passage 100 is connected to the fresh air. The bypass channel 200 is connected, and the heat exchange core 14 is only in contact with the fresh air channel 100 for heat exchange; the exhaust outlet 11 is communicated with the exhaust chamber 300, and the exhaust chamber 300 also An exhaust fan 12 is provided. This is a further preferred structural form of the present invention, that is, the fresh air channel is located in the exhaust chamber, the fresh air bypass channel is also located in the exhaust chamber, and the heat exchange core is only in contact with the fresh air channel for heat exchange, so that the indoor and outdoor When the temperature difference is large, the indoor exhaust air is used to exchange heat with the outdoor fresh air to recover energy; the heat exchange core is not connected to the fresh air bypass channel to close the fresh air channel when the indoor and outdoor temperature difference is small, and only ventilate through the fresh air bypass channel to avoid Effectively reduce wind resistance; the exhaust chamber is communicated with the exhaust outlet to effectively discharge indoor air to the outside, and the setting of the exhaust fan can open or close the exhaust channel, so that the exhaust chamber is connected to the exhaust inlet or not.

In some embodiments, a fresh air chamber 400 is further included, the fresh air chamber 400 is communicated and disposed between the fresh air inlet 1 and the fresh air passage 100 or the fresh air bypass passage 200, and one end of the fresh air chamber 400 It is communicated with the fresh air inlet 1, and the other end is communicated with the fresh air passage 100 or the fresh air bypass passage 200; and the interior of the fresh air chamber 400 is also provided with a fresh air filter 3 and the fresh air preheating device 4. In the direction of airflow, the fresh air entering the fresh air inlet 1 can flow through the fresh air filter 3 and the fresh air preheating device 4 in sequence. The utility model can also effectively communicate with the fresh air inlet by setting the fresh air chamber, and transport the fresh air to the fresh air passage or the fresh air bypass passage, and the fresh air filter and the fresh air preheating device in the fresh air chamber can effectively cool the fresh air. It performs filtering and preheating to prevent the fresh air blowing into the room from causing discomfort to the human body.

In some embodiments, the fresh air chamber 400 is further provided with a first filter 2, and the first filter 2 is disposed between the fresh air filter 3 and the fresh air inlet 1;

A second filter 6 is also provided at the exhaust air inlet 5 to filter the indoor exhaust air sucked by the exhaust air inlet 5 .

The utility model also uses the first filter and the second filter arranged at the exhaust air inlet to perform a coarse filtering effect on the fresh air inlet to block impurities such as large particles existing in the fresh air entering the room from the outside, and the second filter can When the indoor exhaust air enters the exhaust chamber, it can filter to prevent impurities from entering the exhaust chamber and improve the purity of the indoor exhaust.

In some embodiments, a fresh air damper 15 is also included, the fresh air damper 15 can control the fresh air passage 100 to open or close, and the fresh air damper 15 can also control the fresh air bypass passage 200 to open or close;

The fresh air damper 15 includes a fresh air damper motor 151, a fresh air scavenging blade, a fresh air bypass vent valve motor 152 and a fresh air bypass scavenging blade, and the fresh air scavenging blade is located in the fresh air passage 100, and the fresh air bypass Sweeping blades are located in the fresh air bypass passage 200, the fresh air damper motor 151 can control the movement of the fresh air scavenging blades to open or close the fresh air passage 100, and the fresh air bypass valve motor 152 can control The fresh air bypass scavenging blade moves to open or close the fresh air bypass passage 200 .

The utility model can also control the opening or closing of the fresh air passage and the opening or closing of the fresh air bypass passage through the setting of the fresh air damper. Preferably, the fresh air damper motor can open or close the fresh air passage, and the fresh air bypass vent valve motor can Open or close the fresh air bypass channel.

In some embodiments, an inner circulation chamber 500, an inner circulation air inlet 7 and an inner circulation air valve 8 are further included, and the inner circulation air inlet 7 is communicated with the inner circulation chamber 500, and the inner circulation chamber 500 One end of the inner circulation chamber 500 is also communicated with the fresh air passage 100 and the fresh air bypass passage 200 respectively, and the other end of the inner circulation chamber 500 is also communicated with the fresh air outlet 19, and the inner circulation air valve 8 The inner circulating air inlet 7 is controlled to open or close. The utility model can also introduce indoor air flow into the inner circulation chamber through the inner circulation air inlet through the setting of the inner circulation chamber, and control the opening and closing of the channel through the inner circulation air valve. One end of the inner circulation chamber is connected to the fresh air channel. It can also be connected to the fresh air bypass channel, and it can also suck in outdoor fresh air from the fresh air channel or the fresh air bypass channel, and discharge the outdoor fresh air and/or the indoor internal circulating air into the room through the fresh air outlet, effectively complete the introduction of fresh air into the room, and The internal circulating air continues to return to the interior.

In some embodiments, a third filter 9 is also provided at the downstream end of the airflow of the inner circulating air inlet 7,

The inner circulation chamber 500 is provided with a fresh air fan 17 and a heat exchanger 18, and the fresh air outlet 19 leads to the room;

The inner circulation chamber 500 is also provided with a fresh air temperature and humidity sensor 10 and a carbon dioxide sensor 16; the fresh air air conditioner also includes an electric controller 13.

The utility model can also filter and purify the air at the inner circulation inlet through the third filter arranged at the inner circulation inlet, and the fresh air fan can drive the airflow in the inner circulation chamber to drive it to pass through the fresh air outlet. Entering the room, the internal circulating air and/or outdoor fresh air can be effectively exchanged through the heat exchanger before entering the room; the temperature and humidity of the indoor air can be effectively monitored through the fresh air temperature and humidity sensor and carbon dioxide sensor, and monitoring The concentration of carbon dioxide in the indoor air flow, so as to control whether to open various modes such as fresh air, internal circulation air, mixed air, fresh air bypass or fresh air mode according to the temperature and humidity of the indoor air flow and carbon dioxide concentration. The concentration meets the comfort requirements of the human body.

In some embodiments, the fresh air blower 17 includes a fresh air motor 172 , a first fresh air volute 171 and a second fresh air volute 173 , and the fresh air motor 172 can simultaneously connect with the first fresh air volute 171 and the second fresh air volute Shell 173 is attached. The utility model is also connected with the two volutes through the fresh air motor, which can form a driving structure of a single motor and double air blades, improves the driving effect, and has a compact and simple structure.

The utility model also provides a control method for the fresh air air conditioner as described in any one of the preceding items, which comprises:

The detection step is to detect the indoor carbon dioxide concentration C, the _indoor ambient temperature T and the _outdoor ambient temperature T;

Judging step, judging the relationship between carbon dioxide concentration C and set concentration A, judging the relationship between indoor ambient temperature T and _{indoor set} temperature T, and judging the relationship between _outdoor ambient temperature T and _indoor ambient temperature T Relationship;

The control step is based on the relationship between the carbon dioxide concentration C and the set concentration A, the relationship between the indoor ambient temperature T _and the indoor _set temperature T, and the relationship between the _outdoor ambient temperature T and the _indoor ambient temperature T , controlling the fresh air air conditioner to execute one of the fresh air mode, the mixed air mode, the internal circulation mode and the fresh air bypass mode.

The control method of the fresh air air conditioner of the utility model can control which mode the fresh air air conditioner executes according to the carbon dioxide concentration and the conditions of the indoor ambient temperature and the outdoor ambient temperature, so as to be able to operate the fresh air mode, the mixed air mode, the internal Either the circulation mode or the fresh air bypass mode, and the fresh air heat exchange can recover energy, which can effectively improve the indoor air quality and achieve a good energy saving effect; and the fresh air bypass function can be used when the indoor and outdoor temperature difference is small. The heat exchange core reduces airflow resistance, increases energy, improves the operating energy efficiency of fresh air conditioners, and improves efficiency.

In some embodiments, when the exhaust fan 12, the fresh air damper motor 151, the fresh air bypass vent valve motor 152 and the internal circulation damper 8 are included at the same time:

In the judging step, the judgment condition 1 is C≥A, the judgment condition 2 is -T1≤Tin _{- Tset≤T1} , and the judgment condition 3 is- _{T2≤Tout -} Tin≤T2;

In the control step, if the judgment condition 1 is not satisfied, control to close the exhaust fan 12 and the fresh air damper motor 151, close the fresh air bypass vent valve motor 152, open the internal circulation damper 8, and operate the internal circulation mode. ;

When it is judged that the judgment condition 1 is met; and when the judgment condition 2 is not met, the control is to open the fresh air damper motor 151, close the fresh air bypass vent valve motor 152, open the internal circulation damper 8, and open the exhaust fan 12. Run the mixed air mode;

When the judgment condition 1 is met, the judgment condition 2 is met, and the judgment condition 3 is met at the same time, the control is to close the inner circulation damper 8, close the fresh air damper motor 151, open the fresh air bypass ventilation valve motor 152, and open the exhaust fan 12. Run fresh air bypass mode;

When the judgment condition 1 is met, the judgment condition 2 is met, and the judgment condition 3 is not met, the control is to close the internal circulation damper 8, turn on the fresh air damper motor 151, turn off the fresh air bypass ventilation valve motor 152, and turn on the exhaust fan 12. , run the fresh air mode;

A is the set carbon dioxide concentration value, T1 is the first set temperature value, and T2 is the second set temperature value.

The fresh air environmental control integrated machine has fresh air mode, mixed air mode, internal circulation mode, and fresh air bypass mode.

Fresh air mode: As shown in Figure 4, in this mode, the fresh air damper motor 151 controls the damper to open, the fresh air bypass damper motor 152 controls the damper to close, and the internal circulation damper 8 closes. The outdoor fresh air is introduced through the fresh air inlet 1, purified by the first filter 2 and the fresh air filter 3, and then passed through the fresh air preheating device 4 (open when the outdoor fresh air temperature is too low to preheat the fresh air to prevent the heat exchange core 14 from freezing. ) into the heat exchange core 14 of the fresh air passage, and then the fresh air is introduced into the heat exchanger 18 by the fresh air fan 17 to complete cooling or heating, and finally enters the room through the fresh air outlet 19. At the same time, the indoor air is introduced from the exhaust inlet 5, filtered by the second filter 6 and then enters the heat exchange core 14, and finally the indoor air is extracted from the exhaust outlet 11 to the outdoors through the exhaust fan 12. When passing through the heat exchange core 14, the outdoor fresh air and the indoor air complete the exchange of heat and humidity, thereby realizing the energy saving effect.

Mixed air mode: As shown in Figure 5, in this mode, the fresh air damper motor 151 controls the damper to open, the fresh air bypass vent valve motor 152 controls the damper to close, and the internal circulation damper 8 opens. The outdoor fresh air is introduced through the fresh air inlet 1, purified by the first filter 2 and the fresh air filter 3, and then passed through the fresh air preheating device 4 (opened when the outdoor fresh air temperature is too low to preheat the fresh air to prevent the heat exchange core 14 from freezing. ) into the heat exchange core 14 of the fresh air passage, while the indoor air enters through the internal circulation air inlet 7, is filtered by the third filter 9, passes through the internal circulation air valve 8, and is mixed with the clean fresh air entering the fresh air passage, and then is filtered by the third filter 9. The fresh air fan 17 introduces the fresh air into the heat exchanger 18 to complete cooling or heating, and finally enters the room through the fresh air outlet 19 . At the same time, the indoor air is introduced from the exhaust inlet 5, filtered by the second filter 6 and then enters the heat exchange core 14, and finally the indoor air is drawn out from the exhaust outlet 11 to the outside through the exhaust fan 12, and passes through the heat exchange core 14. When indoors, the outdoor fresh air and indoor air complete the exchange of heat and humidity to achieve energy-saving effect.

Internal circulation mode: As shown in Figure 6, in this mode, the fresh air damper motor 151 controls the damper to close, the fresh air bypass vent valve motor 152 controls the damper to close, and the internal circulation damper 8 opens. At this time, the exhaust fan is turned off, the indoor air enters through the internal circulation air inlet 7, is filtered by the third filter 9 and passes through the internal circulation air valve 8, and then the fresh air is introduced into the heat exchanger 18 by the fresh air fan 17 to complete cooling or heating. Finally, the fresh air outlet 19 enters the room to complete the internal circulation of the indoor air.

Fresh air bypass mode: As shown in Figure 7, in this mode, the fresh air damper motor 151 controls the damper to close, the fresh air bypass damper motor 152 controls the damper to close and open, and the internal circulation damper 8 closes. The difference between this mode and the fresh air mode is that when the fresh air enters, it does not pass through the heat exchange core 14, but passes through the fresh air bypass hollow structure controlled by the fresh air bypass ventilation valve motor 152. In this mode, the wind resistance of the fresh air is reduced, the load of the fresh air fan 17 is reduced, and the energy is more energy-saving. At the same time, the fresh air does not pass through the heat exchange core 14, which can prolong the service life of the heat exchange core 14.

The control logic of each operation mode is as follows:

After starting up, open the internal circulation air valve 8, start the exhaust fan 12, start the fresh air fan 17, and detect the indoor carbon dioxide concentration through the carbon dioxide sensor 16. If the judgment condition 1 is not met, turn off the exhaust fan 12, and run the internal circulation mode; Judgment condition 1, if judgment condition 2 is not met, turn on the fresh air damper motor 151, and run the mixed air mode; if the judgment condition 1, judgment condition 2 and judgment condition 3 are met at the same time, close the internal circulation damper 8, and run the fresh air bypass mode; If condition 1 and condition 2 are met at the same time, but condition 3 is not met, close the internal circulation damper 8, turn off the fresh air damper motor 151, open the fresh air bypass vent valve motor 152, and run the fresh air bypass fresh air mode. If the determination condition 4 is satisfied, the fresh air preheating device 4 is turned on, and if the determination condition 4 is not satisfied, the fresh air preheating device 4 is turned off.

Judgment Condition 1: Carbon Dioxide Concentration ≥ A

Judgment condition 2: -T1≤indoor ambient temperature-indoor set temperature≤T1

Judgment condition 3: -T2≤outdoor ambient temperature -indoor ambient temperature≤T2

Judgment condition 4: Ambient temperature < T

If the carbon dioxide concentration is too high, it is judged that there is a demand for fresh air, and the ambient temperature is greatly different from the set temperature and there is a need for cooling, so at the same time, the need to open mixed air can effectively cool down and introduce fresh air.

If the judgment condition 1 is met, but the judgment condition 2 is not met, it means that the carbon dioxide concentration is high and the room needs heat exchange, and the mixed air mode is operated;

If the judgment condition 1, judgment condition 2 and judgment condition 3 are satisfied at the same time, it means that there is no need for heat exchange indoors, and the temperature difference between indoor and outdoor is small, then the fresh air bypass mode is operated (when the difference between the ambient temperature and the set temperature is small, there is no cooling demand, There is only fresh air demand, so there is no need for indoor circulation; at this time, the indoor ambient temperature is quite different from the outdoor ambient temperature.

If condition 1 and condition 2 are met at the same time, but condition 3 is not met, it means that no heat exchange is required in the room, and if condition 3 is not met, it means that the temperature difference between outdoor and indoor is large, and fresh air heat exchange (ambient temperature and set temperature) is required. When the difference is small, there is no cooling demand, only fresh air demand, so there is no need for indoor circulation; at this time, the difference between the indoor ambient temperature and the outdoor ambient temperature is small, and the heat exchange is of little significance, so it is necessary to open the fresh air bypass mode.)

Among them: A is the set carbon dioxide concentration value, the value is 900-1100PPM

T1 is the set temperature value, ranging from 1°C to 3°C

T2 is the set temperature value, ranging from 2°C to 5°C

T is the set temperature value, the value is -30℃-0℃

In some embodiments, A ranges from 900 to 1100 PPM, T1 ranges from 1°C to 3°C, and T2 ranges from 2°C to 5°C.

In some embodiments, when the fresh air preheating device 4 is also included:

The judging step can also judge whether the judgment condition 4 is satisfied: T _ring <T3;

In the control step, if the determination condition 4 is satisfied, the fresh air preheating device 4 is turned on, and if the determination condition 4 is not satisfied, the fresh air preheating device 4 is turned off, wherein the T ring is the ambient temperature, and T3 is the third set temperature. When the outdoor fresh air temperature is too low, the core will freeze and damage the core, so the fresh air preheating device is required to preheat.

Alternative Embodiment 1, as shown in Figures 9-10,

Hexagonal heat exchange cores 14 can be replaced by squares and diamonds.

As shown in FIG. 9 , in the partial cross-sectional view of A-A, the lower end is the heat exchange core 14, which belongs to the fresh air passage; the upper end is a hollow structure, which belongs to the fresh air bypass passage. In the partial cross-sectional view of B-B, the motor of the fresh air bypass valve controls the air outlet of the fresh air bypass passage, and the motor of the fresh air damper controls the air outlet of the fresh air passage.

Alternative Embodiment 2, as shown in Figures 11-14,

The fresh air bypass channel and the fresh air channel can also be arranged to be placed left and right, and the heat exchange core is the fresh air channel; another fresh air bypass channel is provided.

As shown in FIG. 11 , in the partial cross-sectional view of A-A, the right end is the heat exchange core 14, which belongs to the fresh air passage; the left end is a hollow structure, which belongs to the fresh air bypass passage. Correspondingly, a corresponding air valve is arranged at the channel port. In the partial cross-sectional view of B-B, the fresh air air valve motor 151 controls the air outlet of the fresh air passage, and the fresh air bypass ventilation valve motor 152 controls the air outlet of the fresh air bypass passage.

As shown in FIG. 13 , in the partial cross-sectional view of A-A, the left end is the heat exchange core 14, which is a fresh air bypass passage; the right end is a hollow structure, which belongs to the fresh air passage. Correspondingly, a corresponding air valve is set at the channel port. As shown in FIG. 14 , in the B-B partial cross-sectional view, the fresh air air valve motor 151 controls the air outlet of the fresh air passage, and the fresh air bypass air valve motor 152 controls the fresh air bypass passage.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model. The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present invention, several improvements and modifications can be made. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (9)

1. A fresh air conditioner is characterized in that: the method comprises the following steps:

fresh air inlet (1), air exhaust inlet (5), air exhaust outlet (11), fresh air outlet (19), heat exchange core (14), fresh air channel (100) and fresh air bypass channel (200), fresh air sucked through fresh air inlet (1) can enter fresh air channel (100) and is in with the air exhaust that enters through air exhaust inlet (5) heat exchange core (14) department carries out the heat transfer, and through fresh air sucked through fresh air inlet (1) can also enter in fresh air bypass channel (200), the air current in fresh air bypass channel (200) directly passes through without heat exchange core (14) heat transfer fresh air outlet (19) gets into indoorly.

2. The fresh air conditioner according to claim 1, wherein:

the fresh air heat exchanger further comprises an exhaust cavity (300), the exhaust cavity (300) is communicated with the exhaust inlet (5), the fresh air channel (100) can be communicated with the fresh air inlet (1), and the heat exchange core (14) is located between the fresh air channel (100) and the exhaust cavity (300) so that fresh air in the fresh air channel (100) and exhaust air in the exhaust cavity (300) exchange heat at the heat exchange core (14);

and the fresh air bypass channel (200) can also be communicated with the fresh air inlet (1), and the heat exchange core body (14) does not exchange heat with the fresh air bypass channel (200).

3. The fresh air conditioner according to claim 2, wherein:

the fresh air channel (100) is arranged in the exhaust cavity (300), the fresh air bypass channel (200) is also arranged in the exhaust cavity (300), the fresh air channel (100) is connected with the fresh air bypass channel (200), and the heat exchange core (14) is only in contact with the fresh air channel (100) for heat exchange; the exhaust outlet (11) is communicated with the exhaust chamber (300), and an exhaust fan (12) is further arranged in the exhaust chamber (300).

4. A fresh air conditioner according to claim 2, wherein:

the fresh air device is characterized by further comprising a fresh air chamber (400), wherein the fresh air chamber (400) is communicated between the fresh air inlet (1) and the fresh air channel (100) or the fresh air bypass channel (200), one end of the fresh air chamber (400) is communicated with the fresh air inlet (1), and the other end of the fresh air chamber (400) is communicated with the fresh air channel (100) or the fresh air bypass channel (200); just the inside of new trend cavity (400) still is provided with new trend filter (3) and new trend preheating device (4), along the air current flow direction, the new trend that gets into in new trend import (1) can flow through in proper order new trend filter (3) with new trend preheating device (4).

5. The fresh air conditioner according to claim 4, wherein:

the fresh air chamber (400) is also internally provided with a first filter (2), and the first filter (2) is arranged between the fresh air filter (3) and the fresh air inlet (1);

and a second filter (6) is also arranged at the exhaust air inlet (5) to filter indoor exhaust air sucked by the exhaust air inlet (5).

6. A fresh air conditioner according to any one of claims 1 to 5 wherein:

the fresh air inlet valve (15) can control the fresh air channel (100) to be opened or closed, and the fresh air inlet valve (15) can also control the fresh air bypass channel (200) to be opened or closed;

fresh air blast gate (15) are swept wind blade, fresh air bypass blast gate motor (152) and fresh air bypass and are swept wind blade including fresh air blast gate motor (151), fresh air, are swept wind blade and are located in fresh air passageway (100), fresh air bypass is swept wind blade and is located in fresh air bypass passageway (200), fresh air blast gate motor (151) can be controlled fresh air is swept wind blade motion and is in order to open or close fresh air passageway (100), fresh air bypass blast gate motor (152) can be controlled fresh air bypass is swept wind blade motion and is in order to open or close fresh air bypass passageway (200).

7. The fresh air conditioner according to claim 6, wherein:

still include inner loop cavity (500), inner loop wind import (7) and inner loop blast gate (8), inner loop wind import (7) with inner loop cavity (500) intercommunication, the one end of inner loop cavity (500) still with fresh air channel (100) with fresh air bypass channel (200) communicate respectively, just the other end of inner loop cavity (500) still with fresh air outlet (19) intercommunication, inner loop blast gate (8) can be right inner loop wind import (7) control is opened or is closed.

8. The fresh air conditioner according to claim 7, wherein:

a third filter (9) is arranged at the downstream end of the air flow direction of the internal circulation air inlet (7),

a fresh air fan (17) and a heat exchanger (18) are arranged in the internal circulation chamber (500), and a fresh air outlet (19) leads to the interior of the chamber;

a fresh air temperature and humidity sensor (10) and a carbon dioxide sensor (16) are also arranged in the internal circulation chamber (500); the fresh air conditioner also comprises an electric controller (13).

9. The fresh air conditioner according to claim 8, wherein:

the fresh air fan (17) comprises a fresh air motor (172), a first fresh air volute (171) and a second fresh air volute (173), and the fresh air motor (172) can be connected with the first fresh air volute (171) and the second fresh air volute (173) at the same time.

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