WO2023051803A1

WO2023051803A1 - One-way flow micro-positive pressure temperature-adjusting fresh air indoor unit, and system and operation method therefor

Info

Publication number: WO2023051803A1
Application number: PCT/CN2022/123411
Authority: WO
Inventors: 杨凡; 郁伟荣
Original assignee: 上海复璐帝流体技术有限公司
Priority date: 2021-09-30
Filing date: 2022-09-30
Publication date: 2023-04-06

Abstract

The present invention relates to the technical field of indoor fresh air temperature adjustment, and provides a one-way flow micro-positive pressure temperature-adjusting fresh air indoor unit, and a system and an operation method therefor. The fresh air indoor unit comprises a casing, a PM2.5 filter, a humidifier, a carbon dioxide concentration sensor, a heat exchanger, and a controller. An outdoor air inlet communicated with an inlet of the PM2.5 filter is provided on the back of the casing, and an outlet of the PM2.5 filter is communicated with an inlet of the heat exchanger; an outlet of the heat exchanger is connected to a silent fan mounted on top of the casing, and an air outlet of the silent fan is arranged upward or downward or horizontally. In the present invention, the fresh air temperature is adjusted to a set temperature by the heat exchanger, the fresh air is then pressed into an indoor space by the low-noise fan, and a one-way flow micro-positive pressure is maintained indoors by adjusting the air volume of the low-noise fan; when the indoor carbon dioxide concentration is higher than a health standard, the air supply amount is adjusted, so that the indoor space has a fresh air supply rate for ensuring human health, and the purposes of health, comfort, environment friendliness and energy saving are achieved.

Description

A unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit and its system and operating method

technical field

The invention belongs to the technical field of indoor fresh air temperature regulation, and relates to a unidirectional flow micro positive pressure temperature regulation fresh air indoor unit and its system and operation method.

Background technique

At present, the main function of household air conditioners commonly used is to adjust the temperature of the air, and in order to ensure the effect of temperature adjustment, it is generally required that the space to be adjusted must be in a closed state. In this closed state, the indoor closed space Dust, smog, bacteria, viruses, and exhaust gas continue to increase, and the oxygen content continues to decrease, which inevitably leads to worsening air quality, forming the well-known "air conditioning disease". In this regard, the conventional solution is not to stay in the air-conditioned room for a long time, and open the window to ventilate the fresh air, or use the indoor exhaust air to form a negative pressure to supply fresh air to the room by leaking through the gap between the door and the window, so as to improve the air condition of the room. Control air quality. However, due to the current air pollution is becoming more and more serious, there is PM2.5 pollution in the outdoor air. If the conventional way of opening windows for ventilation is adopted, the turbulent flow of untreated outdoor fresh air enters the room, and people have inadvertently inhaled the air that may Inhalation of particles or harmful gases.

Indoor air conditioning is closely related to daily work and life. Indoor air temperature and gas composition are the guarantee of human comfort and health, and air conditioning and fresh air are important technologies to improve the quality of life. Although air-conditioning has begun to be popularized and fresh air technology has attracted increasing attention, the current air-conditioning system and fresh air system have the following defects: 1) The fresh air indoor unit uses indoor air to circulate, and the air quality will deteriorate if used for a long time, the oxygen content will decrease, and the carbon dioxide concentration will increase. , affecting human health; 2) The fresh air system can use outdoor air to be filtered and sent indoors. The fresh air system can ensure excellent air quality indoors, but a large amount of fresh air without temperature regulation will destroy the ambient temperature of the indoor unit.

Therefore, aiming at the technical defects existing in the above-mentioned existing indoor air-conditioning technology, it is necessary to develop a healthy, comfortable, environment-friendly and energy-saving indoor air conditioner to meet human demands for high-quality work and life.

Contents of the invention

The technical problem to be solved by the present invention is to propose a healthy, comfortable, environmentally friendly and energy-saving unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit and its system and operation for the above-mentioned defects in the existing air-conditioning system and fresh air system. method.

To achieve the above object, the present invention adopts the following technical solutions:

The first aspect of the present invention is to provide a unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit, including a casing and a PM2.5 filter, a heat exchanger and a silent fan arranged inside the casing, wherein:

The lower end of the back of the casing is provided with an air inlet connected to the PM2.5 filter inlet, and at least one carbon dioxide concentration sensor is installed on the outer wall of the upper end;

The outlet of the PM2.5 filter is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the silent fan installed on the top of the casing, and the air outlet of the silent fan is upward or downward Or arranged horizontally.

Preferably, the PM2.5 filter is installed at the lower part of the casing, and the heat exchanger is arranged above it.

Preferably, the heat exchanger is installed at the air outlet of the PM2.5 filter, and the silent fan is installed at the air outlet of the heat exchanger in a series arrangement.

Preferably, the air inlet is located at the lower end surface of the back of the casing, and is arranged opposite to the inlet of the PM2.5 filter.

Preferably, the unidirectional flow micro positive pressure temperature-regulated fresh air indoor unit further includes a refrigerant inlet pipe and a refrigerant return pipe respectively connected to the refrigerant inlet and outlet of the heat exchanger;

Wherein, the remote ends of the refrigerant inlet pipe and the refrigerant return pipe are arranged through the air inlet.

Preferably, the unidirectional flow micro positive pressure temperature-regulated fresh air indoor unit also includes a humidifier installed inside the casing;

Wherein, the air outlet of the humidifier is connected to the inlet of the silent fan.

Preferably, the unidirectional flow micro positive pressure temperature-regulated fresh air indoor unit further includes: a controller using 4G wireless transmission and control arranged on the upper end surface or the top end surface of the front side of the casing;

Wherein, the controller is electrically connected to the silent fan and the solenoid valves on each pipeline, and is connected to the carbon dioxide concentration sensor at the same time; the carbon dioxide concentration sensor adopts double configuration and works at the same time. When the health standard is used, the fresh air supply volume is adjusted by the silent fan, so that the indoor carbon dioxide concentration is controlled within the human health standard.

The second aspect of the present invention is to provide a unidirectional flow micro-positive pressure temperature-regulated fresh air system based on the above-mentioned fresh air indoor unit, including:

PM2.5 filter, the PM2.5 filter is used to remove dust and sterilize the outdoor air flowing through it;

A heat exchanger, the heat exchanger is used to receive the outdoor fresh air that has been dedusted and sterilized, and adjust the temperature of the outdoor fresh air flowing through it to a set temperature;

Silent fan, which is used to send the temperature-regulated outdoor fresh air into the room;

The controller is distributed and electrically connected to the PM2.5 filter, the solenoid valve of the heat exchanger and the silent fan, and is used to adjust the fresh air volume according to the fresh air exchange rate set by the indoor air health standard, so that the indoor Form a healthy and comfortable air environment with constant temperature wind, low wind speed, one-way flow, slight positive pressure, and no oxygen return.

Preferably, the unidirectional flow micro positive pressure temperature regulation fresh air system also includes:

A carbon dioxide concentration sensor, the carbon dioxide concentration sensor is electrically connected to the controller for real-time monitoring of indoor carbon dioxide concentration;

A humidifier, the humidifier is electrically connected to the controller, and is used to adjust the humidity and temperature of the fresh air in the room and monitor the carbon dioxide concentration in the room.

The third aspect of the present invention is to provide a unidirectional flow micro positive pressure temperature regulation operation method of the fresh air system as described above, including the steps:

(1) Start the silent fan, the outdoor air enters the indoor unit under the suction of the silent fan, and passes through the PM2.5 filter for dust removal and sterilization;

(2) The temperature of the outdoor air after dust removal and sterilization is adjusted to the set temperature through the heat exchanger;

(3) When the humidity of the fresh air regulated by the heat exchanger is lower than the set value, the humidifier provides water vapor at the same temperature as the temperature-regulated air, so that the humidity reaches the set value, and the temperature-regulated air is maintained while humidifying. no change in temperature;

(4) The temperature-regulated and humidity-controlled fresh outdoor air pressure is sent into the room through the silent fan, and by adjusting the air volume of the silent fan, the room maintains a slight positive pressure of one-way flow, and at the same time, the room has a suitable air exchange rate ;

(5) When the indoor carbon dioxide concentration is higher than the health standard, use the silent fan to increase the air supply volume, increase the air exchange rate, and reduce the indoor carbon dioxide concentration

The present invention adopts above-mentioned technical scheme, compared with prior art, has following technical effect:

The unidirectional flow micro-positive pressure indoor fresh air indoor unit provided by the present invention uses a PM2.5 filter to remove dust and sterilize the outdoor air, and adjust the temperature of the fresh air after dust removal and sterilization to the set temperature through a heat exchanger, such as low humidity At the set value, the fresh air humidity is adjusted to the set value through the humidifier, and then the fresh air is sent into the room through the low-noise fan, and the room maintains a unidirectional flow with a slight positive pressure by adjusting the air volume of the low-noise fan ; When the indoor carbon dioxide concentration is higher than the health standard, the air supply volume is adjusted so that the indoor space has a fresh air supply rate that ensures human health, achieving the goals of health, comfort, environmental protection, and energy saving, and meeting people's needs for high-quality work and life.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of a unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit of the present invention;

Figure 2 is a schematic diagram of the assembly structure of a unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to the present invention;

Fig. 3 is a schematic diagram 2 of the assembly structure of a unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to the present invention;

Fig. 4 is a side view structural schematic diagram of a unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit of the present invention;

Fig. 5 is a frame principle diagram of a unidirectional flow micro positive pressure temperature regulation fresh air system of the present invention;

Fig. 6 is a schematic flowchart of a unidirectional flow micro positive pressure temperature regulation operation method according to the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

As shown in Figure 1, Figure 2 and Figure 4, a healthy, comfortable, environmentally friendly, energy-saving unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit is provided to solve the defects of existing air conditioning systems and fresh air systems. The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit mainly includes a casing 10, a PM2.5 filter 20 sealed and installed inside the casing 10, a heat exchanger 30 and a silent fan 40, and the silent fan 40 is The aerodynamic drive unit of the fresh air indoor unit is used to draw outdoor air into the room and maintain the indoor air in a slightly positive pressure state, achieving the goals of health, comfort, environmental protection and energy saving, and meeting people's needs for high-quality work and life .

Specifically, as shown in Figures 1 and 2, the whole of the unidirectional flow micro-positive pressure temperature-adjusting fresh air indoor unit is a square cylinder or a rectangular cylinder or a garden cylinder with a certain height, and the casing 10 is made of metal Sheet metal parts or aluminum alloy or engineering plastics are processed by metal sheet metal forming or integrated forming to form a hollow square shell structure. PM2.5 filter 20, heat exchanger 30 and silent fan 40 are all installed in the hollow square shell structure. inside the shell. An air inlet 11 is provided on the back shell of the casing 10, one end of the air inlet 11 is connected to the outdoor through a pipe, and the other end of the air inlet 11 communicates with the inlet of the PM2.5 filter 20 . And at least one carbon dioxide concentration sensor (50) is installed on the outer wall of the upper end of the casing 10, and the indoor carbon dioxide concentration is monitored in real time through the carbon dioxide concentration sensor (50).

As shown in Fig. 2, Fig. 3 and Fig. 4, in the case 10 of the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit, the connection relationship of each component is as follows: the air inlet 11 is located in the case 10 The lower end surface of the back is positioned opposite to the inlet of the PM2.5 filter 20 . The air inlet of the PM2.5 filter 20 is connected to the air inlet 11 for receiving the outdoor space and providing fresh air for the system to maintain a slight positive pressure in the room. The outlet of the PM2.5 filter 20 is connected to the inlet of the heat exchanger 30, and is used to send the fresh air after dedusting and sterilization into the heat exchanger 30, and the heat exchanger 30 will flow through it. The temperature of the outdoor fresh air is adjusted to a set temperature. The outlet of the heat exchanger 30 is connected to the silent blower 40 installed on the top of the casing 10, which is used to suck the temperature-regulated outdoor fresh air into the room, and adjust it according to the micro positive pressure and air supply rate set in the room. The wind pressure and air volume of its exhaust outlet.

According to needs, the silent fan 40 can be arranged on the front end surface or both sides of the casing 10, that is, the opening of the silent fan 40 is oriented in a horizontal direction, and the fresh air of a preset temperature is sprayed into the room in the horizontal direction. Alternatively, the silent blower 40 is installed on the top of the casing, as shown in FIGS. 1 and 2 , that is, the opening of the silent blower 40 is arranged upwards, so as to spray fresh air with a preset temperature vertically upwards into the room. Alternatively, the fresh air indoor unit may be turned upside down, and the silent blower 40 may vertically inject fresh air of a preset temperature into the lower room.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, described PM2.5 filter 20 adopts commercially available PM2.5 air filter, has dust removal and sterilization function, is used for carrying out dust removal and sterilization to outdoor space processing, which is installed on the lower part of the casing 10 and fixed on the bottom plate of the casing 10 by bolts. As a preferred solution, the PM2.5 filter 20 includes a primary filter 21 , a dust collection filter module 22 and a charging module 33 .

In addition, in order to make full use of the limited space in the casing 10 and reduce the volume of the overall fresh air indoor unit, according to the air purification process, the heat exchanger 30 can be installed and connected above the PM2.5 filter 20, and accordingly, the The silent blower 40 is installed above the heat exchanger 30 to reduce the flow path and flow time of outdoor air between the units in the fresh air indoor unit.

As a preferred embodiment, as shown in Figure 1 and Figure 4, the heat exchanger 30 is at least two groups, and the heat exchanger (30) is installed at the air outlet position of the PM2.5 filter (20) , the silent blower (40) is installed at the air outlet of the heat exchanger (30) in a series arrangement. The heat exchanger 30 plays different roles in different operation modes of the fresh air indoor unit according to usage requirements. For example, when the fresh air indoor unit system is cooling, the two sets of heat exchangers 30 operate alternately, one set of heat exchangers 30 with refrigerant in the inner chamber is used for cooling and cooling of outdoor air, and the other set of inner chambers stops feeding the refrigerant while using Fresh air at normal temperature on the outer surface of the heat exchanger de-ices or defrosts the outer surface of the heat exchanger. For another example, when the fresh air indoor unit system is heating, the two sets of heat exchangers 30 are arranged as heat exchangers and work simultaneously or in one group.

It should be noted that, as shown in Figure 1 and Figure 3, as the necessary equipment for the unidirectional flow micro positive pressure temperature regulation fresh air system, it also includes the refrigerant inlet pipe 12 and the refrigerant return pipe respectively connected to the heat exchanger 30 13 and condensate drain pipe 14. The refrigerant inlet pipe 12 is used to provide cooling or heating refrigerant to the heat exchanger 30. The refrigerant can be gas or liquid, such as air, nitrogen or argon as a gas refrigerant, and water, brine, ethylene glycol or propylene glycol solution as a liquid refrigerant. etc., or low-temperature carbon dioxide, etc., depending on the needs.

Wherein, the remote ends of the refrigerant inlet pipe 12 , the refrigerant return pipe 13 and the condensed water discharge pipe 14 are all arranged through the air inlet 11 . Make full use of the large-diameter pipe space of the air inlet 11 to lead the refrigerant inlet pipe 12, the refrigerant return pipe 13 and the condensate discharge pipe 14 from the casing 10 to the outside, so that the refrigerant inlet pipe 12, the refrigerant return pipe 13 and the condensate The water discharge pipe 14 is hidden, which solves the problem of messy arrangement of the various pipes in the existing fresh air indoor unit, and improves the external aesthetics of the fresh air indoor unit.

As shown in Figures 1 and 2, the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit also includes a humidifier (60) installed inside the casing (10); the humidifier (60) is installed in the Inside the casing (1), the humidifier (60) is an existing conventional humidifier, which is commercially available, and is mainly composed of a water storage device for collecting and returning water, a steam generator, regulating water temperature and fresh air setting temperature. The same water heating and cooling device composition.

In order to realize the intelligent control of the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit, as shown in Fig. 1 and Fig. 2, it also includes a controller 70 arranged on the upper end surface or the top end surface of the front side of the casing 10, The controller 70 adopts 4G wireless transmission and cloud control, and the controller 70 is electrically connected to the solenoid valves on the pipelines such as the silent fan 40 and the heat exchanger 30, and is connected to a double-set carbon dioxide gas concentration detection system at the same time for Control the start and stop of the silent fan 40, control the speed of the silent fan 40, and switch and control the two sets of heat exchangers 30 to operate alternately or simultaneously. According to needs, a remote controller wirelessly connected with the controller 70 is also equipped, and one remote controller can control one or more fresh air indoor units at the same time.

In addition, the controller 70 is also connected to the carbon dioxide concentration sensor (50), and the carbon dioxide concentration sensor (50) adopts a double configuration and works at the same time. When the indoor carbon dioxide concentration is higher than the health standard, the silent fan will (40) Adjust the fresh air supply volume so that the indoor carbon dioxide concentration is controlled within the human health standard. That is, the carbon dioxide concentration sensor (50) provides a display alarm and a remote control alarm according to the measured carbon dioxide concentration in the fresh air after heat exchange, and when the carbon dioxide concentration reaches a concentration that affects human health, it will directly shut down and give an alarm.

In addition, the controller 70 is sequentially provided with a temperature display, a carbon dioxide concentration display, an air volume and wind pressure display, a timer switch display, a fault alarm, a power indicator light, an emergency stop button, and a power switch. Through the temperature display, air volume and air pressure display and timing switch installed on the control panel of the device, the temperature, air volume and running time of the fresh air indoor unit can be set when the fresh air indoor unit is running. Easy to use.

Embodiment two

As shown in Figure 5, a unidirectional flow micro-positive pressure temperature-regulated fresh air system for the above-mentioned fresh air indoor unit is provided, the air conditioning system mainly includes a PM2.5 filter 20, a heat exchanger 30, a silent fan 40 and a controller 70 four functional units, the PM2.5 filter 20 , the heat exchanger 30 and the silent fan 40 are all packaged in the casing 10 .

The controller 70 is arranged on the surface of the casing 10, respectively connected to the silent fan 40, and connected to the switch solenoid valves before and after the PM2. The fresh air volume can be adjusted according to the rate to form a healthy and comfortable air environment indoors with constant temperature wind, low wind speed, one-way flow, slight positive pressure, and no oxygen return.

As shown in Figure 5, under the suction of the silent fan 40, outdoor air is provided to the PM2.5 filter 20 in the system, and the PM2.5 filter 20 is used to remove dust and sterilize the outdoor air flowing through it, The outdoor fresh air after being dedusted and sterilized by the PM2.5 filter 20 is transported into the heat exchanger 30 under the action of the fan suction. The heat exchanger 30 is used to receive the outdoor fresh air after dust removal and sterilization, and adjust the temperature of the outdoor fresh air flowing through it to a set temperature by using a refrigerant. Finally, the temperature-adjusted outdoor fresh air is sucked into the room by the silent fan 40, and the air pressure and air volume of the air outlet are adjusted according to the micro positive pressure and air supply rate set in the room.

In the air conditioning system, the heat exchangers 30 are in two groups arranged in parallel. According to needs, the air conditioning system is controlled to be in heating or cooling mode. For example, when the system is cooling, two sets of heat exchangers 30 operate alternately, one set is used for cooling and cooling of outdoor air, and the other set uses the incoming outdoor air De-ice or defrost the external surface of the heat exchanger. When the system is heating, the two sets of heat exchangers 30 are all arranged as heat exchangers, and work simultaneously or as a group. In addition, double sets of heat exchangers 30 arranged in parallel are used to work alternately to de-ice or defrost the outer surface of the heat exchanger by using the heat of outdoor air, thereby ensuring the continuity and stability of the fresh air indoor unit.

In addition, the unidirectional flow micro-positive pressure temperature-regulated fresh air system also includes a carbon dioxide concentration sensor (50) and a humidifier (60) electrically connected to the controller 70, respectively. The carbon dioxide concentration sensor (50) is electrically connected to the controller (70) for real-time monitoring of indoor carbon dioxide concentration; the humidifier (60) is electrically connected to the controller (70) for adjusting the humidity of indoor fresh air and temperature to monitor indoor carbon dioxide concentration.

During the operation of the unidirectional flow micro-positive pressure temperature-regulated fresh air system, the standard air volume during fresh air operation is an air change rate of about once per hour. The carbon dioxide concentration sensor (50) installed in the controller (70) and the indoor unit is all in the measuring position no matter what state the indoor unit is in. When neither the temperature-adjusting fresh air nor the fresh air is turned on, as long as the measured value of a group of carbon dioxide concentration sensors (50) reaches 800PPM, the indoor unit fan 40 is automatically started, and the air volume of the fresh fan is kept at 350m3/hr. When the CO2 concentration drops to 800ppm, it will automatic

Stop the running of the fresh air; when the air volume of the fresh air blower reaches 350m3/hr and is maintained, the CO concentration continues to increase and reaches 900ppm, and the controller (70) flashes and sounds an alarm simultaneously.

Embodiment three

As shown in Figure 6, a unidirectional flow micro-positive pressure temperature regulation operation method based on the fresh air indoor unit of the first embodiment and the fresh air system of the second embodiment is provided, which includes the following steps:

(1) Install the fresh air indoor unit, and correctly install and connect the ventilation pipe from the air inlet 11, the refrigerant inlet pipe 12, the refrigerant return pipe 13 and the condensed water discharge pipe 14, the refrigerant inlet pipe 12 and the refrigerant return pipe 13 are externally connected to the refrigerant, The condensed water discharge pipe 14 is externally connected to the outside;

(2) Start the silent fan 40 to operate the cooling mode, and the outdoor air enters the indoor unit under the suction of the silent fan 40, and is dedusted and sterilized through the PM2.5 filter 20;

(3) The outdoor air that has been dedusted and sterilized by the PM2.5 filter 20 is passed through one of the heat exchangers 30 to adjust the temperature to the set 22° C. through the low-temperature carbon dioxide refrigerant;

(4) When the humidity of the fresh air regulated by the heat exchanger (30) is lower than the set value, the humidifier (60) provides water vapor at the same temperature as the temperature-regulated air to make the humidity reach the set value. While keeping the temperature of the temperature-adjusting air unchanged;

(5) The fresh outdoor air pressure after temperature adjustment and humidity control is sent into the room through the silent fan (40), and by adjusting the air volume of the silent fan (40), the room maintains a slight positive pressure of one-way flow, and at the same time makes the indoor Have an appropriate air change rate;

(6) When the indoor carbon dioxide concentration is higher than the health standard, increase the air supply volume through the silent fan (40), increase the ventilation rate, and reduce the indoor carbon dioxide concentration;

(7) After a single heat exchanger 30 has been running for a period of time, the two sets of heat exchangers 30 are automatically controlled to operate alternately through the controller 70 or the preset timing switch display. When one set of heat exchangers 30 is used for cooling and cooling of outdoor air , another group of heat exchangers 30 uses the outdoor air to de-ice or defrost the outer surface of the heat exchanger.

Application Example 1

Based on the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit described in Embodiment 1, single-connected or multi-connected indoor units can be used in homes, hospitals, schools, hotels, conference centers, etc. The settings of the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit are as follows:

A single temperature-adjusting fresh air indoor unit is suitable for spaces with an area of less than 50 square meters and an indoor volume of less than 150 cubic meters. If the volume of a single-room space is greater than 150 cubic meters, multiple units in a single-room space are operated in parallel. When a single indoor unit is running in a single-room space, the standard temperature-adjusted fresh air volume is 20% of the volume of the single-room space (the minimum air volume of a single indoor unit is not less than 30m3/hr), when multiple indoor units in a single-room space are running, the total temperature-adjusted fresh air volume is 20% of the volume of the single-room space (the minimum air volume of each indoor unit is not less than 30m3/hr), and the multi-line The temperature-adjusting air volume of indoor units is the same.

Each single-room space is equipped with a remote control, and the temperature of the temperature-adjusting air outlet of the indoor unit is the temperature set by the remote control; during operation, when the indoor carbon dioxide concentration is less than 800ppm, keep the temperature-regulating air volume at 20% of the space volume, and when the indoor carbon dioxide When the concentration reaches 800ppm, the temperature-regulating air volume is changed to 150m3/hr and maintained; when the temperature-regulated air volume is 150m3/hr and maintained, if the carbon dioxide concentration drops to 600ppm, the temperature-regulated air volume is changed to 20% of the space volume and maintained ; After the air volume of the temperature adjustment is changed to 150m3/hr, the carbon dioxide concentration continues to increase to 900ppm, the indoor unit is stopped to supply refrigerant, the air volume of the fresh air fan of the indoor unit is automatically adjusted to 350m3/hr, the remote control flashes and the sound alarms.

Application Example 2

Based on the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit described in Embodiment 1, single-connected or multi-connected indoor units can be used in large public places, gymnasiums, high-speed rail stations, computing centers, etc. The settings of the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit are as follows:

Adopting multi-zone control type, each zone can supply temperature-regulated air independently or the whole zone can supply temperature-regulated air with different set temperatures at the same time, and each zone adopts multi-connected mode, which can be used independently for a single zone or several zones. The volume of the space is calculated based on the height that requires temperature control (generally calculated as a height of 3 meters), and the rest of the space is regarded as a space that does not need temperature control. During operation, the indoor fresh air of the multi-unit groups in all areas must be turned on, and the air volume is the standard air volume (adjusted according to the space installation, the standard air volume of each indoor unit is the same, and the maximum temperature-adjusting air volume of each indoor unit is the same), and it needs to be adjusted. The warm air area runs the refrigerant control program of the temperature-adjusted air, and each area is equipped with a remote control; the fresh air of the indoor units in all areas needs to be linked at the same time (purpose: regardless of whether the temperature-adjusted air is set, all areas are unidirectional flow Fresh air with the same pressure and velocity in all areas).

When the CO2 concentration in the temperature-adjusting air area reaches 800PPM, the air volume of all indoor units is changed to 200m3/hr and maintained; after the air volume of all indoor units is changed to 200m3/hr and maintained, if the carbon dioxide concentration drops to 600ppm, the air volume of all indoor units is changed to 600ppm. Operate and maintain the standard air volume; after the air volume of all indoor units is changed to 200m3/hr and maintained, and the carbon dioxide concentration continues to increase to 900ppm, the indoor unit is stopped from supplying refrigerant, and the air volume of the fresh air fan of the indoor unit is automatically adjusted to 350m3/hr. Blinks simultaneously with an audible alarm.

In summary, the unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit developed by the present invention uses a PM2.5 filter to remove dust and sterilize the outdoor air, and adjust the temperature of the fresh air after dust removal and sterilization to the set temperature through a heat exchanger If the humidity is lower than the set value, the humidity of the fresh air will be adjusted to the set value through the humidifier, and then the fresh air will be sent into the room through the low-noise fan, and the room will be kept in a one-way direction by adjusting the air volume of the low-noise fan. When the indoor carbon dioxide concentration is higher than the healthy standard, the air supply volume will be adjusted so that the indoor space has a fresh air supply rate that ensures human health, achieving the goals of health, comfort, environmental protection, and energy saving, and satisfying people's expectations for high-quality work and the needs of life.

The last few points should be explained: First, in the description of this application, it should be explained that, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, which can be mechanical connection Or electrical connection, it can also be the internal communication of two components, it can be directly connected, "up", "down", "left", "right", etc. are only used to indicate the relative positional relationship, when the absolute position of the object being described Change, the relative positional relationship may change;

Secondly: in the drawings of the embodiments of the present invention, only the structures related to the disclosed embodiments of the present invention are involved, and other structures can refer to the general design. In the case of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

Finally: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in this practical application. within the scope of the new protection.

Claims

A unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit is characterized in that it includes a casing and a PM2.5 filter, a heat exchanger and a silent fan arranged inside the casing, wherein:

The lower end of the back of the casing is provided with an air inlet connected to the PM2.5 filter inlet, and at least one carbon dioxide concentration sensor is installed on the outer wall of the upper end;

The outlet of the PM2.5 filter is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the silent fan installed on the top of the casing, and the air outlet of the silent fan is upward or downward Or arranged horizontally.
The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to claim 1, wherein the PM2.5 filter is installed at the lower part of the casing, and the heat exchanger is arranged above it.
The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to claim 1, wherein the heat exchanger is installed at the air outlet of the PM2.5 filter, and the silent fan is installed at the heat exchanger The position of the air outlet is arranged in series.
The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to claim 1, wherein the air inlet is located at the lower end surface of the back of the casing, and is connected to the inlet of the PM2.5 filter Arranged relatively.
The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to claim 1, further comprising a refrigerant inlet pipe and a refrigerant return pipe respectively connected to the refrigerant inlet and outlet of the heat exchanger;

Wherein, the remote ends of the refrigerant inlet pipe and the refrigerant return pipe are arranged through the air inlet.
The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to claim 1, further comprising a humidifier installed inside the casing;

Wherein, the air outlet of the humidifier is connected to the inlet of the silent fan.
The unidirectional flow micro-positive pressure temperature-regulated fresh air indoor unit according to claim 1, further comprising: a controller using 4G wireless transmission and control arranged on the upper end surface or the top end surface of the front side of the casing;

Wherein, the controller is electrically connected to the silent fan and the solenoid valves on each pipeline, and is connected to the carbon dioxide concentration sensor at the same time; the carbon dioxide concentration sensor adopts double configuration and works at the same time. When the health standard is used, the fresh air supply volume is adjusted by the silent fan, so that the indoor carbon dioxide concentration is controlled within the human health standard.
A unidirectional flow micro-positive pressure temperature-adjusting fresh air system based on the fresh air indoor unit described in any one of claims 1 to 7, characterized in that it comprises:

PM2.5 filter, the PM2.5 filter is used to remove dust and sterilize the outdoor air flowing through it;

A heat exchanger, the heat exchanger is used to receive the outdoor fresh air that has been dedusted and sterilized, and adjust the temperature of the outdoor fresh air flowing through it to a set temperature;

Silent fan, which is used to send the temperature-regulated outdoor fresh air into the room;

The controller is distributed and electrically connected to the PM2.5 filter, the solenoid valve of the heat exchanger and the silent fan, and is used to adjust the fresh air volume according to the fresh air exchange rate set by the indoor air health standard, so that the indoor Form a healthy and comfortable air environment with constant temperature wind, low wind speed, one-way flow, slight positive pressure, and no oxygen return.
The unidirectional flow micro-positive pressure temperature-regulated fresh air system according to claim 7, further comprising:

A carbon dioxide concentration sensor, the carbon dioxide concentration sensor is electrically connected to the controller for real-time monitoring of indoor carbon dioxide concentration;

A humidifier, the humidifier is electrically connected to the controller, and is used to adjust the humidity and temperature of the fresh air in the room and monitor the carbon dioxide concentration in the room.
A unidirectional flow micro positive pressure temperature regulation operation method for the fresh air system according to any one of claims 8 to 9, characterized in that it comprises the steps of:

(1) Start the silent fan, the outdoor air enters the indoor unit under the suction of the silent fan, and passes through the PM2.5 filter for dust removal and sterilization;

(2) The temperature of the outdoor air after dust removal and sterilization is adjusted to the set temperature through the heat exchanger;

(3) When the humidity of the fresh air regulated by the heat exchanger is lower than the set value, the humidifier provides water vapor at the same temperature as the temperature-regulated air, so that the humidity reaches the set value, and the temperature-regulated air is maintained while humidifying. no change in temperature;

(4) The temperature-regulated and humidity-controlled fresh outdoor air pressure is sent into the room through the silent fan, and by adjusting the air volume of the silent fan, the room maintains a slight positive pressure of one-way flow, and at the same time, the room has a suitable air exchange rate ;

(5) When the indoor carbon dioxide concentration is higher than the health standard, increase the air supply volume through the silent fan, increase the ventilation rate, and reduce the indoor carbon dioxide concentration.