CN209763410U - A new fan with temperature adjustment function - Google Patents

Abstract

The utility model discloses a fresh fan with a temperature regulating function, which belongs to the field of air conditioning equipment. The utility model includes a blower and a temperature and humidity adjustment unit; the blower is arranged in the air supply pipeline, and the temperature and humidity adjustment unit includes a heat exchanger, a plate heat exchanger and an electric three-way valve; the heat exchanger is arranged in the air supply pipeline, The heat exchanger includes water coil heat exchanger Ⅰ, tube-fin heat exchanger Ⅱ and tube-fin heat exchanger Ⅲ. The pipeline between the heat exchangers II is provided with a compressor, and the plate heat exchanger is connected with the tube-fin heat exchanger III through pipelines. The utility model regulates the fresh air temperature at the air supply port by adjusting the opening degree of the proportional regulating valve, which is convenient for independent adjustment of the temperature and humidity of the fresh air, and can also perform cold and heat compensation in the room to improve the energy utilization rate of the fresh air fan system. Make the temperature and humidity of the fresh air conform to the comfort level of the human body.

Description

A new fan with temperature adjustment function

technical field

The utility model relates to the field of air conditioning equipment, more specifically, relates to a fresh fan with a temperature regulating function.

Background technique

With the improvement of people's material life, people have higher and higher requirements for interior decoration, and the decoration materials used in houses usually cause the concentration of VOC or SVOC to exceed the standard. In order to ensure the indoor oxygen supply and the harmful gas emission in decoration materials , while preventing pollutants (PM2.5, etc.) outside the residence from entering the room, it is essential to install fresh air equipment with purification functions in the residence. The fresh air fan uses the patented technology of fresh air convection to achieve convection of indoor air through independent air supply and induction, thereby maximizing the replacement of indoor air. The fresh fan can also ensure that the air entering the room is clean and healthy. At present, the mainstream household fresh air fans in the market include direct filter fresh air type, dual-channel heat recovery type, and indoor and outdoor mixed air supply type. The air supply status will be affected by the outdoor air. Generally, the air supply temperature in summer is high and the humidity is high, and the air supply temperature in winter is low and humidity is low, which affects the comfort of the human body and increases the air conditioning load on the indoor side.

After searching, the name of the invention is: an air-conditioning unit with deep dehumidification function (patent application number: CN201620656762.1, application date: 2016-06-22), the application includes a main frame, which is equipped with Exhaust air channel and fresh air channel; the exhaust air channel is provided with a return air port and an air exhaust port; the fresh air channel is provided with an air inlet and an air supply port; Fresh air coarse-effect filter, electronic purifier, hot and cold water coil, evaporator, condenser, humidifier and blower. Heat treatment, and good energy saving. The weak point of this application is: complex structure, not easy to install.

In addition, the name of the invention is: heat pump and fresh air matching operation system (patent application number: CN201721586453.2, application date: 2017-11-24), which consists of a fresh air module, a fresh air pipeline, a heat pump unit, a medium circulation pipeline, The clean fresh air generated by the fresh air module is connected to the fresh air inlet of the utilization terminal through the fresh air pipe; the cooling or heat generated by the heat pump unit is connected to the medium inlet and medium outlet of the utilization terminal through the medium circulation pipeline. This application combines the heat pump system with the fresh air system, which can save the power source of the fresh air system, automatically adjust the indoor temperature and replace the indoor air, and save energy and cleanliness. The weak point of this application is: fresh air cannot be humidified.

Utility model content

1. The technical problems to be solved by the utility model

The purpose of this utility model is to overcome the disadvantages of the prior art that the fresh air cannot independently adjust the temperature and humidity of the fresh air, and provide a fresh air with a function of temperature adjustment, which can adjust the temperature of the fresh air sent into the room to control the temperature and humidity of the house. Heat and cold compensation.

2. Technical solution

In order to achieve the above object, the technical solution provided by the utility model is:

A fresh air blower with temperature adjustment function of the utility model comprises a blower and a temperature and humidity adjustment unit; the blower is arranged in the air supply duct; the temperature and humidity adjustment unit includes a heat exchanger, a plate heat exchanger and Electric three-way valve; the heat exchanger is arranged in the air supply pipeline, and the heat exchanger includes a water coil heat exchanger I, a tube-fin heat exchanger II and a tube-fin heat exchanger III, and the above-mentioned water pan Tube heat exchanger I, tube-fin heat exchanger II and tube-fin heat exchanger III are sequentially arranged in the air supply pipe along the flow direction of fresh air; the outlet pipe of the plate heat exchanger is provided with a proportional regulating valve ; The pipeline between the plate heat exchanger and the tube-fin heat exchanger II is provided with a compressor, and the plate heat exchanger is connected to the tube-fin heat exchanger III through the pipeline; the electric three-way valve includes three valve ports, among which the valve Port Ⅰ is connected to water coil heat exchanger Ⅰ through pipe Ⅰ, valve port Ⅱ is connected to water outlet pipe through pipe Ⅱ, valve port Ⅲ is connected to water outlet pipe through pipe Ⅲ, and a proportional regulating valve is set between pipe Ⅱ and pipe Ⅲ. The proportional regulating valve is located on the outlet pipe.

Preferably, a humidifier is also included, and the humidifier is arranged in the air supply duct between the tube-fin heat exchanger II and the tube-fin heat exchanger III.

Preferably, a filter net is also included, and the filter net is arranged in the air supply pipe, and the filter net is arranged between the blower fan and the water coil heat exchanger I.

Preferably, the tube-fin heat exchanger II is connected to the tube-fin heat exchanger III through the working fluid pipeline I, and the above-mentioned working fluid pipeline I is provided with a throttling valve.

Preferably, the tube-fin heat exchanger II is an evaporator, and the tube-fin heat exchanger III is a reheating coil.

Preferably, the plate heat exchanger includes S1 port, S2 port, S3 port and S4 port, the above-mentioned S1 port and S4 port are arranged correspondingly, the S1 port is connected to the water outlet through the water outlet pipe, and the above-mentioned S2 port and S3 port Corresponding to the setting, the S2 port is connected to the water inlet through the water inlet pipe.

Preferably, the plate heat exchanger is connected to the tube-fin heat exchanger II through the working fluid pipeline II, and the above-mentioned working fluid pipeline II is provided with a compressor.

3. Beneficial effect

Compared with the existing known technology, the technical solution provided by the utility model has the following remarkable effects:

(1) A fresh air fan with a temperature adjustment function of the utility model includes a blower fan, a temperature and humidity adjustment unit and a humidifier. The humidity adjustment unit adjusts the temperature of the fresh air at the air supply port, the humidifier humidifies the fresh air, the fresh air fan adjusts the temperature and cools the fresh air in summer, and heats and moisturizes the fresh air in winter to improve the comfort of the human body indoors;

(2) A fresh fan with temperature adjustment function of the utility model, the water pipe is provided with a proportional regulating valve, and the water flow in the water coil heat exchanger I is controlled and adjusted by adjusting the opening of the proportional regulating valve, and then adjusted The heat exchange between the system water supply and the fresh air is convenient for adjusting the temperature of the fresh air sent into the room. The fresh air entering the room can compensate the indoor load and meet the individual needs of users.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a fresh air fan with a temperature adjustment function;

Fig. 2 is a schematic diagram of the summer working structure of a fresh air blower with temperature regulation function in embodiment 1;

Fig. 3 is a schematic diagram of the winter working structure of a fresh air fan with temperature regulation function in embodiment 1;

Fig. 4 is a schematic structural diagram of the electric three-way valve.

Explanation of the labels in the schematic diagram:

100, air blower; 110, filter screen;

200. Temperature and humidity adjustment unit; 201. Air supply duct;

210. Heat exchanger; 211. Water coil heat exchanger I; 212. Tube-fin heat exchanger II; 213. Tube-fin heat exchanger III;

220. Throttle valve; 221. Working fluid pipeline I;

230. Compressor; 231. Working medium pipeline II;

240. Plate heat exchanger;

250. Proportional regulating valve;

260. Electric three-way valve; 261. Valve port I; 262. Valve port II; 263. Valve port III;

271, water inlet pipe; 272, water supply pipe; 273, water outlet pipe; 274, pipe I; 275, pipe III; 276, pipe II;

300. Humidifier.

Detailed ways

In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions that the utility model can be implemented. Therefore, there is no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the utility model without affecting the effect and the purpose of the utility model. The disclosed technical content must be within the scope covered. At the same time, terms such as "upper", "lower", "left", "right", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation. The change or adjustment of the relative relationship should also be regarded as the applicable category of the present utility model without substantively changing the technical content; in addition, the various embodiments of the present utility model are not independent of each other, but can be combined.

Example 1

As shown in Figure 1, a fresh air blower with a temperature regulation function of the present utility model includes a blower 100 and a temperature and humidity adjustment unit 200; the blower 100 and the temperature and humidity adjustment unit 200 cooperate with each other to purify the air in the house, and at the same time make the house The temperature and humidity inside are maintained within the appropriate range. The blower 100 is arranged in the air supply duct 201, and the blower 100 pumps the fresh outdoor air to the fresh air for filtering and temperature adjustment, so as to keep the indoor air clean; the temperature and humidity adjustment unit 200 is used to adjust the temperature and humidity of the fresh air, the temperature and humidity The humidity adjustment unit 200 includes a heat exchanger 210, a plate heat exchanger 240 and an electric three-way valve 260; Heat exchanger II 212 and tube-fin heat exchanger III 213, water coil heat exchanger I 211, tube-fin heat exchanger II 212 and tube-fin heat exchanger III 213 are sequentially arranged in the air supply duct 201 along the flow direction of fresh air, The tube-fin heat exchanger II 212 is an evaporator, the tube-fin heat exchanger III 213 is a condenser, and the heat exchanger 210 adjusts the temperature and humidity of the fresh air through direct contact with the fresh air to exchange heat. In winter, after the blower 100 sends the fresh air into the air supply duct 201, the fresh air is heated when it passes through the water coil heat exchanger I 211, and the heated fresh air enters the room through the air supply duct 201, and the compressor 230 stops working at this time; In summer, after the blower 100 sends the fresh air into the air supply duct 201, the fresh air first passes through the water coil heat exchanger I 211 for pre-cooling, and the pre-cooled fresh air is supercooled in the tube-fin heat exchanger II 212, and then passes through the The tube-fin heat exchanger III 213 performs reheating, and the reheated fresh air enters the room through the air supply duct 201 .

The above-mentioned plate heat exchanger 240 includes S1 port, S2 port, S3 port and S4 port, wherein the side of the plate heat exchanger 240 close to the heat exchanger 210 is provided with S3 port and S4 port, and the S3 port of the heat exchanger 210 passes through The pipe is connected to the inlet of the tube-fin heat exchanger Ⅲ213, the refrigerant enters the tube-fin heat exchanger Ⅲ213 through the pipe, and the refrigerant condenses and releases heat in the tube-fin heat exchanger Ⅲ213, so that in the tube-fin heat exchanger Ⅲ213 reheats the fresh air; the outlet of the tube-fin heat exchanger Ⅲ213 is connected to the inlet of the tube-fin heat exchanger Ⅱ212 through the working fluid pipeline I221, and the working fluid pipeline I221 is provided with a throttle valve 220, the throttle valve 220 is used to adjust the flow rate of the refrigerant on the working medium pipeline I221; the refrigerant evaporates and absorbs heat in the tube-fin heat exchanger II212, thereby cooling the fresh air in the tube-fin heat exchanger II212; the tube-fin heat exchange The outlet of the device II 212 is connected to the S4 port of the heat exchanger 210 through the working medium pipeline II 231, and the working medium pipeline II 231 is provided with a compressor 230, and the compressor 230 compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The compressed refrigerant enters the plate heat exchanger 240 through the S4 port, and the refrigerant exchanges heat with the system water supply in the plate heat exchanger 240, and then the refrigerant flows out through the S3 port and enters the next cycle.

The other side of the plate heat exchanger 240 is provided with an S1 port and an S2 port, wherein the S1 port is connected to the water outlet through the water outlet pipe 273, and the water outlet pipe 273 is provided with a proportional regulating valve 250, and the proportional regulating valve 250 can adjust the flow rate of the water outlet pipe. The flow rate of 273; the S2 port is connected to the water inlet through the water inlet pipe 271; it is worth noting that the S1 port and the S4 port are set correspondingly, and the S2 port and the S3 port are set correspondingly, and the flow direction of the plate heat exchanger 240 system water supply is From S2 to S1, the flow direction is opposite to the flow direction of the refrigerant in the plate heat exchanger 240 .

The water inlet pipe 271 is connected to the inlet of the water coil heat exchanger I211 through the water supply pipe 272. The outlet of the water coil heat exchanger I211 is connected to the electric three-way valve 260 through the pipe I274, wherein the electric three-way valve 260 includes three valve ports, and the outlet of the water coil heat exchanger I211 passes through the pipe I274 is connected with the valve port I261 of the electric three-way valve 260 .

The fresh air blower of the utility model controls the flow direction of the system water supply by switching the valve port of the electric three-way valve 260, and then realizes the purpose of adjusting the fresh air temperature at the air inlet in different seasons. The valve port II 262 of the electric three-way valve 260 is connected to the water outlet pipeline 273 through the pipeline II 276; in addition, the valve port III 263 of the electric three-way valve 260 is connected to the water outlet pipeline 273 through the pipeline III 275 (as shown in Figure 4), and the pipeline III 275 is connected to the water outlet pipeline 273. The connection of the pipeline 273 is located between the proportional regulating valve 250 and the S1 port; thus, the connection position of the pipeline I 274 and the outlet pipeline 273 can be adjusted by adjusting the opening or closing of each valve port of the electric three-way valve 260 . For example, open valve port I261 and valve port III263 (close valve port II262) in winter, the system water supply in pipe I274 flows into the water outlet pipe 273 through the electric three-way valve 260 and pipe III275, and the water can be adjusted through the proportional regulating valve 250. The flow rate of the system water supply in the coil heat exchanger I211 (as shown in FIG. 3 ) makes the fresh air at the air inlet and the system water supply exchange heat in the water coil heat exchanger I211. Or, when opening the valve port I261 and valve port II262 (closed valve port III263) in summer, the system water supply in the pipeline I274 flows into the water outlet pipeline 273 through the electric three-way valve 260 and the pipeline II276, and the water is adjusted by the proportional regulating valve 250. The flow rate of the system water supply in the coil heat exchanger I211 (as shown in FIG. 2 ) enables the fresh air at the air inlet to be pre-cooled in the water coil heat exchanger I211. (as shown in picture 2). It is worth noting that a stop valve may be provided on the water inlet pipe 271 , and the stop valve may close the system water supply in the plate heat exchanger 240 .

The utility model provides a fresh air fan with a temperature adjustment function, which can adjust the temperature, cool down and dehumidify the fresh air in summer, and heat and humidify the fresh air in winter, so as to improve the comfort of users.

The realization of the technical solution of the utility model includes two modes of cooling in summer and heating in winter, wherein

The working principle of a kind of fresh air fan with temperature regulation function of the present utility model in summer is (as shown in Figure 2):

Switch the electric three-way valve 260 to close the valve port III 263, and the valve port II 262 is connected to the water outlet pipe 273 through the pipe II 276, and the system water flows to the water outlet pipe 273 through the valve port II 262 and the pipe II 276.

During the refrigerant cycle, the plate heat exchanger 240 is connected to the tube-fin heat exchanger II 212 through the working medium pipeline II 231, and the working medium pipeline II 231 is provided with a compressor 230, and the low-temperature and low-pressure refrigerant vapor is first compressed by the compressor 230 The high-temperature and high-pressure refrigerant enters the plate heat exchanger 240 through the S4 port of the plate heat exchanger 240. At this time, the system water supply flows to the S2 port of the plate heat The water pipe 271 is connected to the water inlet, and the system water supply continues to move to the S1 port of the plate heat exchanger 240 under the action of the water flow and flows to the water outlet for the next cycle. The S1 port is connected to the water outlet through the water outlet pipe 273, and the refrigerant In the plate heat exchanger 240, it exchanges heat with the low-temperature 16-18°C side water supply, that is, the system water supply, to obtain a supercooled liquid refrigerant. The S3 port of the device 240 flows to the tube-fin heat exchanger III 213. Among them, the S1 port and the S4 port are set correspondingly, and the S2 port and the S3 port are set correspondingly, that is, the water supply end and the refrigerant end of the plate heat exchanger 240 are set correspondingly, which not only increases the average heat transfer temperature difference of the plate heat exchanger 240, but also improves the plate heat exchanger 240. The heat exchange efficiency of the heat exchanger 240 . The cold liquid refrigerant continues to release heat in the tube-fin heat exchanger III213, heats up the fresh air moving to the tube-fin heat exchanger III213, increases the temperature of the fresh air sent into the room, and maintains the indoor fresh air temperature within an appropriate range Inside. The tube-fin heat exchanger II212 is connected to the tube-fin heat exchanger III213 through the working medium pipeline I221, and the working medium pipeline I221 is provided with a throttle valve 220, and the liquid refrigerant becomes low-temperature and low-pressure after throttling through the throttle valve 220 The gas-liquid two-phase mixture continues to move along the working fluid pipeline I221 to the tube-fin heat exchanger II212, where the refrigerant absorbs heat and re-evaporates to form a gas-phase refrigerant for the next cycle. In summer, when the opening degree of the proportional control valve 250 is increased, the water supply of the system at the water inlet pipe 271 increases, and the condensation heat transfer of the refrigerant on the refrigerant side of the plate heat exchanger 240 increases, so that the temperature of the refrigerant decreases, and then The heat exchange of the tube-fin heat exchanger II 212 is reduced, the fresh air is pre-cooled, and the temperature of the fresh air at the air outlet is reduced, thereby achieving the purpose of cooling the fresh air in summer.

In summer, the system water supply temperature at the water inlet pipe 271, that is, the temperature of the low-temperature side of the plate heat exchanger 240, is 16-18°C, and the fresh air temperature at the air outlet is the outdoor air temperature in summer. The fresh air fan also includes a filter 110, which is arranged in the air supply duct 201, and the filter 110 is arranged between the blower 100 and the water coil heat exchanger I 211, and the blower 100 first draws outdoor air into the air supply duct 201 Inside, after the filter screen 110 filters and sterilizes the fresh air, the blower 100 sends the fresh air to the heat exchanger 210, and the fresh air is pre-cooled in the water coil heat exchanger I211, and the temperature of the fresh air is initially reduced to 20-22°C and preliminarily Dehumidification, the fresh air after pre-cooling and dehumidification continues to move to the tube-fin heat exchanger II 212, where it is recooled and deeply dehumidified in the tube-fin heat exchanger II 212, and the temperature of the fresh air drops to about 10°C. lowest. Under the action of the blower 100, the fresh air moves along the air supply pipe 201 to the tube-fin heat exchanger III 213, that is, the condenser is reheated, so that the fresh air reaches an appropriate supply air temperature, and the temperature of the fresh air increases. The temperature of the fresh air is 22-24 °C, and at the same time, the dirty air in the room is discharged, so that the indoor load is maintained in balance and the comfort of the human body is improved.

The operating principle of a kind of fresh air blower winter with temperature adjustment function of the present utility model is (as shown in Figure 3):

When heating in winter, switch the electric three-way valve 260, close the valve port II 262, and the system water supply flows from the pipe III 275 to the outlet pipe 273 through the valve port III 263. At this time, the compressor 230 does not start, and the tube-fin heat exchanger II 212, Tube-fin heat exchanger III 213 and plate heat exchanger 240 do not work.

The system water supply temperature at the water inlet is 32-35°C, the fresh air temperature at the air inlet is the outdoor air temperature in winter, the blower 100 draws the outdoor air into the air supply pipe 201, and the filter 110 first filters and sterilizes the fresh air, and then The blower 100 sends the fresh air to the water coil heat exchanger I211, the system water enters the water coil heat exchanger I211 along the water supply pipe 272, increases the opening of the proportional regulating valve 250, and the system water supply at the water inlet pipe 271 increases , the more heat the system water supply transfers to the fresh air, the higher the temperature of the fresh air to 24-26°C.

It is worth noting that the fresh air machine also includes a humidifier 300. The humidifier 300 is set in the air supply pipe 201 between the tube-fin heat exchanger II 212 and the tube-fin heat exchanger III 213, and passes through the water coil heat exchanger I 211. The heated fresh air is humidified by the humidifier 300. At this time, the relative humidity of the fresh air increases, and the humidified fresh air enters the room through the air supply duct 201. At the same time, the temperature of the fresh air is controlled at about 20-22°C, thereby realizing the protection of the fresh air in winter. Humidity and temperature are adjusted.

The utility model has been described in detail above in conjunction with specific exemplary embodiments. However, it should be understood that various modifications and changes can be made without departing from the scope of the present invention as defined in the appended claims. The detailed description and drawings are to be regarded as illustrative only, rather than restrictive, and if there are any such modifications and variations, they are intended to fall within the scope of the invention described herein. In addition, the background art is intended to illustrate the current research and development status and significance of this technology, and is not intended to limit the utility model or the application field of the utility model.

More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments but includes modifications, modifications, Any and all embodiments are omitted, such as combinations, adaptations, and/or substitutions between the various embodiments. The definitions in the claims are to be interpreted broadly according to the language used in the claims and not limited to the examples described in the foregoing detailed description or during the prosecution of this application, which examples should be considered non-exclusive. Any steps recited in any method or process claims may be performed in any order and are not limited to the order presented in the claims. Accordingly, the scope of the present invention should be determined only by the appended claims and their legal equivalents, rather than by the description and examples given above.

Claims (7)

1. A fresh air blower with a temperature adjustment function, characterized in that: comprising a blower (100) and a temperature and humidity adjustment unit (200); The blower (100) is arranged in the air supply duct (201); The temperature and humidity adjustment unit (200) includes a heat exchanger (210), a plate heat exchanger (240) and an electric three-way valve (260); the heat exchanger (210) is arranged in the air supply duct (201 ), the heat exchanger (210) includes water coil heat exchanger I (211), tube-fin heat exchanger II (212) and tube-fin heat exchanger III (213), and the above-mentioned water coil heat exchanger Device I (211), tube-fin heat exchanger II (212) and tube-fin heat exchanger III (213) are sequentially arranged in the air supply duct (201) along the flow direction of fresh air; the plate heat exchanger The outlet pipe (273) of (240) is provided with a proportional regulating valve (250); the pipe between the plate heat exchanger (240) and the tube-fin heat exchanger II (212) is provided with a compressor (230), plate type The heat exchanger (240) is connected to the tube-fin heat exchanger III (213) through pipes; the electric three-way valve (260) includes three valve ports, and the valve port I (261) passes through the pipe I (274) and the water pan The pipe heat exchanger I (211) is connected, the valve port II (262) is connected with the water outlet pipe (273) through the pipe II (276), and the valve port III (263) is connected with the water outlet pipe (273) through the pipe III (275). A proportional regulating valve (250) is arranged between the pipeline II (276) and the pipeline III (275), and the proportional regulating valve (250) is located on the water outlet pipeline (273). 2. A fresh air blower with temperature adjustment function according to claim 1, characterized in that it also includes a humidifier (300), and the humidifier (300) is arranged on the tube-fin heat exchanger II (212 ) and the air supply duct (201) between the tube-fin heat exchanger III (213). 3. A fresh air blower with temperature adjustment function according to claim 1, characterized in that: it also includes a filter (110), and the filter (110) is arranged in the air supply duct (201), and The filter screen (110) is arranged between the blower fan (100) and the water coil heat exchanger I (211). 4. A fresh air blower with temperature adjustment function according to claim 1, characterized in that: the tube-fin heat exchanger II (212) passes through the working medium pipeline I (221) and the tube-fin heat exchange The device III (213) is connected, and the above-mentioned working medium pipeline I (221) is provided with a throttle valve (220). 5. A fresh air fan with temperature adjustment function according to claim 1, characterized in that: said tube-fin heat exchanger II (212) is an evaporator, and said tube-fin heat exchanger III (213) is a reheating coil. 6. A fresh air fan with temperature adjustment function according to claim 1, characterized in that: said plate heat exchanger (240) includes S1 port, S2 port, S3 port and S4 port, and said S1 port Corresponding to the S4 port, the S1 port is connected to the water outlet through the water outlet pipe (273), the above-mentioned S2 port and the S3 port are correspondingly arranged, and the S2 port is connected to the water inlet through the water inlet pipe (271). 7. A fresh air fan with temperature adjustment function according to any one of claims 1-6, characterized in that: the plate heat exchanger (240) passes through the working medium pipeline II (231) and the tube-fin heat exchanger II (212) are connected, and the above-mentioned working medium pipeline II (231) is provided with a compressor (230).