Return air preheating water source heat pump all-in-one machine

Abstract

The utility model belongs to the technical field of water source heat pump units, and particularly relates to a return air preheating water source heat pump all-in-one machine which comprises a box body, a condenser, a compressor, an electronic expansion valve, a heat exchanger, a gas-liquid separator and a four-way valve are arranged in the box body, an air inlet is formed in the side wall of the lower portion of the box body, and a return air preheater is arranged at the position, corresponding to the air inlet, in the box body. The first condenser is fixedly installed in the middle of the interior of the box body, a draught fan is arranged above the first condenser and fixedly connected with the side wall of the box body, and an air outlet is formed in the position, corresponding to the draught fan, of the side wall of the upper portion of the box body. According to the utility model, the waste heat of the refrigerant in the first condenser enters the return air preheater for secondary utilization, and the initial temperature of the air reaching the first condenser for heating is higher, so that the temperature rise speed is higher, the temperature is higher, the waste heat is fully utilized, the heat utilization rate is improved, and the use cost of a user is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water source heat pump units, and in particular relates to a return air preheating water source heat pump integrated machine. Background Art

[0002] With the improvement of living standards in modern society, energy consumption for heating and cooling has become a large part of the total social energy consumption. The working principle of the water source heat pump unit is to transfer the heat in the building to the water source in summer; in winter, it extracts energy from the water source at a relatively constant temperature, and uses the heat pump principle to raise the temperature through air or water as a coolant and then sends it to the building. Usually, the water source heat pump consumes 1kW of energy, and the user can get more than 4kW of heat or cooling. The water source heat pump overcomes the deficiency of frosting of the outdoor heat exchanger of the air source heat pump in winter, and has high operating reliability and heating efficiency. With the continuous improvement of production levels, water source heat pump units are often used for temperature regulation in agricultural greenhouses and animal husbandry. However, the existing water source heat pump units have a small cooling and heating range, low cooling or heating efficiency, and poor working quality.

[0003] The utility model patent with publication number CN213931534U proposes a water source heat pump integrated machine, including a cabinet, a horizontal support plate is fixed on the inner wall of the cabinet, a fin heat exchanger is installed on the inner wall of the cabinet located on the upper side of the support plate, a mounting frame is fixed on the top wall of the support plate, a fan is installed on the top of the mounting frame, and a water heat exchanger, a gas-liquid separator and a compressor are installed on the inner bottom wall of the cabinet. The water source heat pump integrated machine in this patented technical solution has a wide cooling and heating range, a small size, is easy to transfer, and has high practicality.

[0004] However, the water source heat pump integrated machine proposed in the patent has certain defects in actual use: the heat utilization rate of the equipment is low, and the wind temperature difference between the air inlet and outlet of the water source heat pump integrated machine is small, resulting in the temperature control effect is not obvious in places far away from the water source heat pump integrated machine, and the temperature regulation ability is poor. Utility Model Content

[0005] The purpose of the utility model is to provide a return air preheating water source heat pump integrated machine to solve the problems raised in the above background technology.

[0006] In order to achieve the above technical purpose, the technical solution of the utility model is:

[0007] A return air preheating water source heat pump integrated machine comprises a box body, wherein a first condenser, a compressor, an electronic expansion valve, a heat exchanger, a gas-liquid separator and a four-way valve are arranged in the box body, an air inlet is arranged on the lower side wall of the box body, a return air preheater is arranged in the box body at a position corresponding to the air inlet, the first condenser is fixedly installed in the middle position of the box body, a fan is arranged above the first condenser, the fan is fixedly connected to the side wall of the box body, and an air outlet is arranged on the upper side wall of the box body at a position corresponding to the fan.

[0008] As an improvement, the electronic expansion valve, the compressor, the heat exchanger and the gas-liquid separator are all fixedly installed at the bottom of the box, the four-way valve is connected to the compressor, the first condenser, the heat exchanger and the gas-liquid separator respectively, the air outlet of the compressor is connected to the air inlet of the first condenser through the four-way valve, the air outlet of the heat exchanger is connected to the air inlet of the gas-liquid separator through the four-way valve, and the outlet of the gas-liquid separator is connected to the return air port of the compressor;

[0009] The return air preheater is a second condenser, the air outlet of the first condenser is connected to the air inlet of the second condenser through a pipeline, the air outlet of the second condenser is connected to the electronic expansion valve through a pipeline, and the electronic expansion valve is connected to the heat exchanger.

[0010] As a further improvement, the air outlet of the compressor is connected to a capillary tube via a pipeline, the other end of the capillary tube is connected to the air inlet of the second condenser, and a solenoid valve is provided on the capillary tube.

[0011] As a further improvement, a refrigerant liquid storage tank is provided in the box body, and the air outlet of the second condenser is respectively connected to the inlet and outlet of the refrigerant liquid storage tank through pipelines.

[0012] As a further improvement, the box body is provided with a rectangular bottom plate, and columns are respectively provided on the four corners of the rectangular bottom plate. The top ends of the four columns are connected to a top plate, side plates are connected between two adjacent columns, and a reinforcing cross bar is connected to the middle of adjacent columns. The compressor, heat exchanger, gas-liquid separator and refrigerant storage tank are fixedly arranged on the bottom plate, and the first condenser is horizontally arranged in the box body, and the position of the first condenser corresponds to the position of the reinforcing cross bar.

[0013] As a further improvement, the air outlet is provided on a side panel located above the reinforcing cross bar, the air inlet is provided on a side panel located below the reinforcing cross bar, and the return air preheater is arranged relatively close to the air inlet.

[0014] As a further improvement, the bottoms of both ends of the fan are fixedly connected to bases, the bottoms of the bases are respectively fixedly connected to support beams, and the two ends of the support beams are respectively fixedly connected to the side walls of the box body;

[0015] A load-bearing base is provided on the lower surface of the rectangular bottom plate. The load-bearing base is two parallel square tubes. The square tubes are fixedly installed on the lower surface of the rectangular bottom plate.

[0016] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0017] The utility model provides a return air preheating water source heat pump integrated machine, which is connected to the return air preheater by arranging a first condenser, so that the waste heat of the refrigerant in the first condenser enters the return air preheater for secondary utilization. When the air enters the box from the air inlet, it is firstly heated by the return air preheater, and then heated for secondary utilization by the first condenser, so that the initial temperature of the air when it reaches the first condenser for heating is relatively high, so the heating speed is faster and the temperature is higher, so that the waste heat is fully utilized, the heat utilization rate is improved, and the user's use cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the internal structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 It is a left view of the internal structure of the utility model;

[0021] Figure 4 is a schematic diagram of the structure of the first condenser and the return air preheater;

[0022] Figure 5 It is a right side view of the internal structure of the utility model;

[0023] Figure 6 It is a rear view structural diagram of the compressor, gas-liquid separator, refrigerant liquid storage tank and heat exchanger;

[0024] Figure 7 It is a schematic diagram of the overall structure of the utility model;

[0025] Among them: 1-box, 2-compressor, 3-electronic expansion valve, 4-heat exchanger, 5-gas-liquid separator, 6-four-way valve, 7-refrigerant storage tank, 8-first condenser, 9-return air preheater, 10-fan, 11-air outlet, 12-air inlet, 13-capillary tube, 14-solenoid valve, 15-base, 16-support beam, 17-load-bearing base, 18-column, 19-reinforcement cross bar. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the specific implementation methods and the accompanying drawings. The accompanying drawings are only for illustrative purposes and are only schematic diagrams, not actual drawings, and should not be construed as limiting the present application. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. It is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0027] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Embodiment 1

[0029] like Figure 1-7 As shown, a return air preheating water source heat pump integrated machine includes a box body 1, in which a first condenser 8, a compressor 2, an electronic expansion valve 3, a heat exchanger 4, a gas-liquid separator 5 and a four-way valve 6 are arranged, an air inlet 12 is arranged on the lower side wall of the box body 1, a return air preheater 9 is arranged in the box body 1 at a position corresponding to the air inlet 12, and the first condenser 8 is fixedly installed in the middle position of the box body 1. The first condenser 8 and the return air preheater 9 both adopt high-density water-immersed aluminum foil condensers, which are composed of a plurality of copper tubes and fins connected to the copper tubes. The copper tubes are filled with refrigerant, and the fins can increase the heat exchange area, thereby improving the heat exchange efficiency. A fan 10 is arranged above the first condenser 8, and the fan 10 is fixedly connected to the side wall of the box body 1, and an air outlet 11 is arranged on the upper side wall of the box body 1 at a position corresponding to the fan 10.

[0030] In this embodiment, the air is heated by heat exchange between the first condenser 8 and the return air preheater 9, and then the heated air is blown out from the air outlet 11 by the fan 10. The fan 10 adopts a volute type double-inlet fan, which can increase the air supply distance and wind speed.

[0031] Specifically, the electronic expansion valve 3, the compressor 2, the heat exchanger 4 and the gas-liquid separator 5 are all fixedly installed at the bottom of the box body 1, and the four-way valve 6 connects the compressor 2, the first condenser 8, the heat exchanger 4 and the gas-liquid separator 5 respectively. The air outlet of the compressor 2 is connected to the air inlet of the first condenser 8 through the four-way valve 6, the air outlet of the heat exchanger 4 is connected to the air inlet of the gas-liquid separator 5 through the four-way valve 6, and the outlet of the gas-liquid separator 5 is connected to the return air port of the compressor 2.

[0032] The return air preheater 9 is the second condenser. The air outlet of the first condenser 8 is connected to the air inlet of the second condenser through a pipeline. The air outlet of the second condenser is connected to the electronic expansion valve 3 through a pipeline. The electronic expansion valve 3 is connected to the heat exchanger 4.

[0033] In this embodiment, Figure 1 Taking the direction in as an example, the air outlet of the compressor 2 is connected to the air inlet at the top of the four-way valve 6, the air outlet at the lower right part of the four-way valve 6 is connected to the first condenser 8, the first condenser 8 is connected to the return air preheater 9 through a copper tube, the return air preheater 9 is connected to the electronic expansion valve 3, the electronic expansion valve 3 is connected to the heat exchanger 4, the heat exchanger 4 is connected to the port at the lower left part of the four-way valve 6, the middle port at the bottom of the four-way valve 6 is connected to the inlet of the gas-liquid separator 5, and the outlet of the gas-liquid separator 5 is connected to the return air port of the compressor 2.

[0034] When the temperature of the refrigerant in the first condenser 8 drops to about 35°C after heat exchange, the refrigerant in the first condenser 8 then enters the second condenser, and the temperature of the refrigerant in the second condenser is about 35°C. An air inlet 12 is provided on the lower side wall of the box body 1 at a position corresponding to the second condenser, and air enters the box body 1 from the air inlet 12. When the air entering the box body 1 passes through the second condenser, it can be preliminarily heated, so that the initial temperature of the air when it passes through the first condenser 8 for heating is higher, so the heating speed is faster and the temperature is higher, so that the waste heat is fully utilized, the heat utilization rate is improved, and the user's use cost is reduced.

[0035] Specifically, the air outlet of the compressor 2 is connected to a capillary tube 13 through a pipe, the other end of the capillary tube 13 is connected to the air inlet of the second condenser, and a solenoid valve 14 is provided on the capillary tube 13. When the temperature of the refrigerant in the second condenser is too low, the solenoid valve 14 is opened to supplement the second condenser with a higher temperature refrigerant, thereby increasing the temperature of the refrigerant in the second condenser and maintaining the stability of the preheating temperature.

[0036] Specifically, a refrigerant storage tank 7 is provided in the box body 1, and the refrigerant is stored in the refrigerant storage tank 7. The air outlet of the second condenser is connected to the inlet and outlet of the refrigerant storage tank 7 through pipelines, which can be used to balance the overall stability of the system and ensure stable and safe operation of the equipment.

[0037] Specifically, the box body 1 is provided with a rectangular bottom plate, and columns 18 are respectively provided at the four corners of the rectangular bottom plate. The top ends of the four columns 18 are connected to the top plate, side plates are connected between two adjacent columns, and the middle parts of adjacent columns are connected to the reinforcing cross bar 19. The compressor 2, the heat exchanger 4, the gas-liquid separator 5 and the refrigerant storage tank 7 are fixedly arranged on the bottom plate, and the first condenser 8 is horizontally arranged in the box body 1, and the position of the first condenser 8 corresponds to the position of the reinforcing cross bar 19.

[0038] Embodiment 2

[0039] like Figure 1-3 As shown, this embodiment has a structure basically the same as that of the first embodiment, the difference being that an air outlet is provided on a side panel located above the reinforcing cross bar 19, an air inlet 12 is provided on a side panel located below the reinforcing cross bar 19, and the return air preheater 9 is arranged relatively close to the air inlet 12.

[0040] The bottoms of both ends of the fan 10 are fixedly connected with bases 15 , the bottoms of the bases 15 are respectively fixedly connected with support beams 16 , and both ends of the support beams 16 are respectively fixedly connected with the side walls of the box body 1 .

[0041] A load-bearing base 17 is provided on the lower surface of the rectangular bottom plate. The load-bearing base 17 is two parallel square tubes fixedly mounted on the lower surface of the rectangular bottom plate.

[0042] The working principle of the utility model is: when heating is needed, the refrigerant is compressed by the compressor 2, and the refrigerant enters the air inlet at the top of the four-way valve 6, and then flows into the first condenser 8 from the air outlet at the lower right part of the four-way valve 6, and releases heat when passing through the first condenser 8 to heat the air. At the same time, the temperature of the refrigerant in the first condenser 8 drops to about 35°C after heat exchange, and the heated air is blown out by the fan 10 through the air outlet 11 to increase the room temperature. The refrigerant in the first condenser 8 enters the return air preheater 9 through the copper tube, and after heat exchange by the return air preheater 9, it enters the heat exchanger 4 through the electronic expansion valve 3. At this time, the refrigerant at -5 to 5°C exchanges heat with the water source in the heat exchanger 4, becomes a normal temperature and pressure state, enters the port at the lower left part of the four-way valve 6, and then flows out from the port in the middle of the bottom and enters the gas-liquid separator 5, and finally is recovered to the compressor 2 to complete the heating cycle.

[0043] The return air preheating water source heat pump integrated machine provided by the utility model is provided with a first condenser 8 connected to the return air preheater 9, so that the waste heat of the refrigerant in the first condenser 8 enters the return air preheater 9 for secondary utilization. When the air enters the box body 1 from the air inlet 12, it is firstly heated by the return air preheater 9, and then heated for the second time by the first condenser 8, so that the initial temperature of the air when it reaches the first condenser 8 for heating is relatively high, so the heating speed is faster and the temperature is higher, so that the waste heat is fully utilized, the heat utilization rate is improved, and the user's use cost is reduced.

[0044] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A return air preheating water source heat pump integrated machine, comprising a box, wherein a first condenser, a compressor, an electronic expansion valve, a heat exchanger, a gas-liquid separator and a four-way valve are arranged in the box, characterized in that: An air inlet is provided on the lower side wall of the box body, a return air preheater is provided at a position corresponding to the air inlet in the box body, the first condenser is fixedly installed in the middle position of the box body, a fan is provided above the first condenser, the fan is fixedly connected to the side wall of the box body, and an air outlet is provided on the upper side wall of the box body at a position corresponding to the fan.

2. The integrated return air preheating water source heat pump according to claim 1, characterized in that: The electronic expansion valve, compressor, heat exchanger and gas-liquid separator are all fixedly installed at the bottom of the box, the four-way valve is connected to the compressor, the first condenser, the heat exchanger and the gas-liquid separator respectively, the air outlet of the compressor is connected to the air inlet of the first condenser through the four-way valve, the air outlet of the heat exchanger is connected to the air inlet of the gas-liquid separator through the four-way valve, and the outlet of the gas-liquid separator is connected to the return air port of the compressor; The return air preheater is a second condenser, the air outlet of the first condenser is connected to the air inlet of the second condenser through a pipeline, the air outlet of the second condenser is connected to the electronic expansion valve through a pipeline, and the electronic expansion valve is connected to the heat exchanger.

3. The integrated return air preheating water source heat pump according to claim 2, characterized in that: The air outlet of the compressor is connected to a capillary tube through a pipeline, the other end of the capillary tube is connected to the air inlet of the second condenser, and a solenoid valve is arranged on the capillary tube.

4. The integrated return air preheating water source heat pump according to claim 2, characterized in that: A refrigerant liquid storage tank is arranged in the box body, and the air outlet of the second condenser is respectively connected to the inlet and outlet of the refrigerant liquid storage tank through pipelines.

5. The integrated return air preheating water source heat pump according to claim 4, characterized in that: The box body is provided with a rectangular bottom plate, and columns are respectively provided on the four corners of the rectangular bottom plate. The top ends of the four columns are connected to the top plate, side plates are connected between two adjacent columns, and reinforcing cross bars are connected to the middle parts of adjacent columns. The compressor, heat exchanger, gas-liquid separator and refrigerant storage tank are fixedly arranged on the bottom plate, and the first condenser is horizontally arranged in the box body, and the position of the first condenser corresponds to the position of the reinforcing cross bar.

6. The integrated return air preheating water source heat pump according to claim 5, characterized in that: The air outlet is arranged on a side panel located above the reinforcing cross bar, the air inlet is arranged on a side panel located below the reinforcing cross bar, and the return air preheater is arranged relatively close to the air inlet.

7. The integrated return air preheating water source heat pump according to claim 5, characterized in that: The bottoms of both ends of the fan are fixedly connected to bases, the bottoms of the bases are respectively fixedly connected to support beams, and the two ends of the support beams are respectively fixedly connected to the side walls of the box; A load-bearing base is provided on the lower surface of the rectangular bottom plate. The load-bearing base is two parallel square tubes. The square tubes are fixedly installed on the lower surface of the rectangular bottom plate.

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