Split type condensation exhaust heat recovery unit

Abstract

The utility model relates to the technical field of central air conditioners, in particular to a split type condensation air exhaust heat recovery unit which comprises an air exhaust channel and an air inlet channel, the two ends of the air exhaust channel and the two ends of the air inlet channel are communicated with the indoor space and the outdoor space respectively, and a compressor and a condensation heat recovery heat exchanger which are communicated with each other are installed in the air exhaust channel. An exhaust filter and an exhaust fan which are communicated with the indoor space and the outdoor space are installed at the two ends of the exhaust channel respectively, a fresh air heat exchanger communicated with the compressor and the condensation heat recovery heat exchanger is installed in the air inlet channel, and a fresh air feeder and a fresh air filter which are communicated with the indoor space and the outdoor space are installed at the two ends of the air inlet channel respectively. The utility model has the advantages that the condition of short circuit of air supply and air exhaust in the unit is avoided, secondary pollution to the air supply is avoided, and the indoor air quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of central air conditioning, in particular to a split-type condensing exhaust heat recovery unit. Background Art

[0002] At present, the direct expansion air conditioning units on the market mainly meet the needs of building cooling, heating, constant temperature and humidity, etc., and have the advantages of wide use and strong site adaptability, but there are still some shortcomings. For example, the outdoor unit condenser of the direct expansion air conditioning unit relies on outdoor air for heat exchange, so the ambient temperature has a great influence on the performance of the entire unit. For example, when the unit is cooling, if the ambient temperature is high, the condensation temperature of the unit will be high, thereby reducing the cooling capacity of the unit; when heating, if the ambient temperature is low, the evaporation temperature of the unit will be low, thereby reducing the heating capacity of the unit. In some buildings, in order to ensure the indoor air quality, a large amount of fresh air needs to be introduced and the indoor polluted air is discharged at the same time. In such buildings, condensation exhaust heat recovery units can be used to recover the cold and hot energy in the exhaust air. Most of the condensation exhaust heat recovery units on the market are integrated. During installation, a long air duct is required to connect the supply air duct and the exhaust air duct, and the supply air and exhaust air are prone to short circuit inside the unit, causing secondary pollution to the supply air and affecting the indoor air quality. Especially in important occasions such as hospitals, the pollution of the supply air will have serious consequences. Utility Model Content

[0003] 1. Technical Problems Solved

[0004] The technical problem to be solved by the utility model is that the existing condensing exhaust heat recovery unit is prone to short circuit between air supply and exhaust inside the unit, causing secondary pollution to the air supply and affecting the indoor air quality.

[0005] 2. Technical Solution

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: a split condensing exhaust heat recovery unit, comprising an exhaust channel and an air inlet channel respectively connected to the indoor and outdoor environments at both ends, the exhaust channel is equipped with a compressor and a condensing heat recovery heat exchanger connected to each other, the exhaust channel is equipped with an exhaust filter and an exhaust fan connected to the indoor and outdoor environments at both ends, the air inlet channel is equipped with a fresh air heat exchanger connected to the compressor and the condensing heat recovery heat exchanger, and the air inlet channel is equipped with a fresh air blower and a fresh air filter connected to the indoor and outdoor environments at both ends.

[0007] Furthermore, the compressor is connected to a first refrigerant pipe and a second refrigerant pipe which are respectively connected to a condensation heat recovery heat exchanger and a fresh air heat exchanger, and the first refrigerant pipe and the second refrigerant pipe are respectively provided with a control valve 1 and a control valve 2.

[0008] Furthermore, a delivery pipe is connected between the condensation heat recovery heat exchanger and the fresh air heat exchanger, and a throttling device is provided on the delivery pipe.

[0009] Furthermore, the first refrigerant pipe, the second refrigerant pipe and the delivery pipe are all covered with insulation sleeves.

[0010] Furthermore, the exhaust fan, compressor and fresh air supply fan are controlled by variable frequency.

[0011] 3. Beneficial Effects

[0012] The advantages of the utility model compared with the prior art are:

[0013] 1. Exhaust air is carried out through the exhaust fan and the exhaust duct, and air is taken in through the fresh air supply fan and the air inlet duct. The exhausted air and fresh air are filtered through the exhaust filter and the fresh air filter respectively to prevent external dust and debris from entering the room.

[0014] 2. Recover the heat of indoor exhaust air through the condensing heat recovery heat exchanger to prevent heat waste.

[0015] 3. When the equipment is running for refrigeration, the compressor transports the refrigerant into the condensation heat recovery heat exchanger, so that the indoor exhaust air enters the condensation heat recovery heat exchanger to exchange heat with the refrigerant. The exhaust air is heated up and discharged. The refrigerant condenses and enters the fresh air heat exchanger to exchange heat with the outdoor fresh air. The fresh air temperature decreases and enters the room. The refrigerant is heated up and returns to the compressor, completing the refrigeration cycle.

[0016] When the equipment is running for heating, the compressor transports the refrigerant into the fresh air heat exchanger for heat exchange with the outdoor fresh air. The fresh air temperature rises and enters the room. The refrigerant condenses and enters the condensation heat recovery heat exchanger for heat exchange with the indoor exhaust air. The exhaust air temperature drops and is discharged outdoors. The refrigerant temperature rises and returns to the compressor, completing the heating cycle. There will be no short circuit between the supply and exhaust air inside the unit, and no secondary pollution will be caused to the supply air, thus ensuring the indoor air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall structural diagram of the utility model.

[0018] Figure 2 It is a structural diagram of the utility model during refrigeration.

[0019] Figure 3 It is a structural diagram of the utility model during heating.

[0020] As shown in the figure: 1. Exhaust fan; 2. Compressor; 3. Condensation heat recovery heat exchanger; 4. Exhaust filter; 5. Throttling device; 6. Fresh air blower; 7. Fresh air heat exchanger; 8. Fresh air filter; 9. First refrigerant pipe; 10. Second refrigerant pipe; 11. Control valve one; 12. Control valve two; 13. Delivery pipe; 14. Exhaust channel; 15. Air inlet channel. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Embodiment 1

[0023] Combined with Figure 1 A split condensing exhaust heat recovery unit comprises an exhaust passage 14 and an air inlet passage 15 respectively connected with indoor and outdoor at both ends; a compressor 2 and a condensing heat recovery heat exchanger 3 connected with each other are installed in the exhaust passage 14; an exhaust filter 4 and an exhaust fan 1 connected with indoor and outdoor are installed at both ends of the exhaust passage 14; a fresh air heat exchanger 7 connected with the compressor 2 and the condensing heat recovery heat exchanger 3 is installed in the air inlet passage 15; a fresh air blower 6 and a fresh air filter 8 connected with indoor and outdoor are installed at both ends of the air inlet passage 15.

[0024] In combination with the above structure, exhaust air is carried out through the exhaust fan 1 and the exhaust duct 14, air is taken in through the fresh air supply fan 6 and the air inlet duct 15, and the exhaust air and the fresh air are filtered by the exhaust filter 4 and the fresh air filter 8 respectively to prevent external dust and debris from entering the room; the condensation heat recovery heat exchanger 3 is used to recover the heat of the indoor exhaust air to prevent heat waste.

[0025] Combined with Figure 1 The compressor 2 is connected to a first refrigerant pipe 9 and a second refrigerant pipe 10 which are connected to a condensation heat recovery heat exchanger 3 and a fresh air heat exchanger 7 respectively. The first refrigerant pipe 9 and the second refrigerant pipe 10 are provided with a control valve 11 and a control valve 2 12 respectively.

[0026] Combined with Figure 1 A delivery pipe 13 is connected between the condensing heat recovery heat exchanger 3 and the fresh air heat exchanger 7. A throttling device 5 is provided on the delivery pipe 13 to throttle the refrigerant, control the flow rate and pressure, protect the pipeline and equipment, reduce leakage and improve safety.

[0027] Combined with Figure 1The first refrigerant pipe 9, the second refrigerant pipe 10 and the delivery pipe 13 are all covered with insulation sleeves to keep the refrigerant warm.

[0028] Combined with Figure 1 The exhaust fan 1, the compressor 2, and the fresh air supply fan 6 adopt frequency conversion control, so that the unit is more energy-efficient under partial load conditions.

[0029] In this embodiment, the split-type condensing exhaust heat recovery unit can achieve functions such as purification and disinfection, constant temperature and humidity, etc. by adding filtering, disinfection, humidification and other equipment.

[0030] The specific usage is as follows:

[0031] When the equipment is running for refrigeration, the compressor 2 transports the refrigerant into the condensation heat recovery heat exchanger 3 through the first refrigerant pipe 9. At the same time, the condensation exhaust fan 1 is running, and the indoor exhaust air enters the condensation heat recovery heat exchanger 3 to exchange heat with the refrigerant. The exhaust air absorbs the heat of the refrigerant to condense the refrigerant. The condensed refrigerant enters the fresh air heat exchanger 7 through the throttling device 5. At the same time, the fresh air supply fan 6 is running, and the outdoor fresh air enters the fresh air heat exchanger 7 to exchange heat with the refrigerant. The fresh air temperature is reduced and enters the room. The refrigerant absorbs heat and evaporates into gaseous refrigerant and returns to the compressor, completing the refrigeration cycle. Figure 2 ;

[0032] When the equipment is running for heating, the compressor 2 transports the refrigerant into the fresh air heat exchanger 7 through the second refrigerant pipe 10. At the same time, the fresh air fan 6 is running, and the outdoor fresh air enters the fresh air heat exchanger 7 to exchange heat with the refrigerant. The fresh air absorbs the heat of the refrigerant to condense the refrigerant. The temperature of the fresh air increases and enters the room. The condensed refrigerant enters the condensation heat recovery heat exchanger 3 through the throttling device 5. At the same time, the exhaust fan 1 is running, and the indoor exhaust air enters the condensation heat recovery heat exchanger 3 to exchange heat with the refrigerant. The exhaust air temperature decreases and is discharged outdoors. The refrigerant absorbs heat and evaporates into gaseous refrigerant and returns to the compressor, completing the heating cycle. As shown in the attached figure Figure 3 ;

[0033] There will be no short circuit between the air supply and exhaust inside the unit, and no secondary pollution will be caused to the air supply, thus ensuring the indoor air quality.

[0034] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A split type condensing exhaust heat recovery unit, comprising an exhaust passage (14) and an air inlet passage (15) with two ends respectively connected to indoor and outdoor, characterized in that: The exhaust passage (14) is provided with a compressor (2) and a condensation heat recovery heat exchanger (3) which are interconnected, and exhaust filters (4) and exhaust fans (1) which are connected to the indoor and outdoor environments are respectively provided at both ends of the exhaust passage (14). The air inlet passage (15) is provided with a fresh air heat exchanger (7) which is connected to the compressor (2) and the condensation heat recovery heat exchanger (3), and fresh air supply fans (6) and fresh air filters (8) which are connected to the indoor and outdoor environments are respectively provided at both ends of the air inlet passage (15).

2. A split type condensing exhaust heat recovery unit according to claim 1, characterized in that: The compressor (2) is connected to a first refrigerant pipe (9) and a second refrigerant pipe (10) which are respectively connected to a condensation heat recovery heat exchanger (3) and a fresh air heat exchanger (7); the first refrigerant pipe (9) and the second refrigerant pipe (10) are respectively provided with a control valve one (11) and a control valve two (12).

3. A split type condensing exhaust heat recovery unit according to claim 2, characterized in that: A delivery pipe (13) is connected between the condensation heat recovery heat exchanger (3) and the fresh air heat exchanger (7), and a throttling device (5) is provided on the delivery pipe (13).

4. A split type condensing exhaust heat recovery unit according to claim 3, characterized in that: The first refrigerant pipe (9), the second refrigerant pipe (10) and the delivery pipe (13) are all covered with insulation sleeves.

5. The split type condensing exhaust heat recovery unit according to claim 1, characterized in that: The exhaust fan (1), the compressor (2) and the fresh air supply fan (6) are controlled by frequency conversion.

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