CN2526752Y - High-temp heat pump refrigerator set - Google Patents

Abstract

A high-temperature heat pump refrigeration unit belongs to heat pump refrigeration equipment used for heating, cooling and hot water supply. The utility model adopts a combination of multiple heat pump refrigerators to form a unit, each heat pump refrigerator includes a compressor, an evaporator, a thermal expansion valve and a condenser, and the refrigerant of each heat pump refrigerator forms an independent circulation loop ; The condensers of each heat pump refrigerator are connected in series to form a multi-stage series shell-and-tube heat exchange structure, sharing a water system; the evaporator is a parallel dry shell-and-tube evaporator. The utility model can effectively increase the temperature of the hot water output by the condenser, and can output high-temperature hot water no matter in the heating operation or the cooling operation, the highest can reach 75°C, and the energy efficiency is high, which can meet different heating requirements. system requirements and provide higher temperature domestic hot water supply.

Description

A high temperature heat pump refrigeration unit

technical field

The utility model belongs to a heat pump refrigeration equipment used for heating, cooling and hot water supply.

Background technique

At present, there are mainly two types of heat pumps used for indoor air conditioning and heating in the market. One is air-cooled heat pumps, which use ambient air as the cooling source during cooling operation and low-temperature heat source during heating operation. The second type is medium temperature water source heat pump, this type of heat pump is water-water heat pump, the evaporator outputs chilled water, and the condenser outputs hot water. Due to structural reasons, this type of heat pump is currently in heating operation At this time, the energy efficiency is low, the heat supply is small, and the temperature of the hot water output by the condenser is still low, generally the highest can only reach 55°C, which is difficult to meet the various needs of heating and domestic hot water.

Contents of the invention

The purpose of this utility model is to propose a high-temperature heat pump refrigeration unit with high energy efficiency, which can output relatively high temperature hot water and supply large heat during heating operation, which can not only provide heating and air conditioning, but also provide life High temperature heat pump refrigeration unit for hot water.

The technical solution of the utility model is to use a plurality of heat pump refrigerators to form a unit. Each heat pump refrigerator includes a compressor, an evaporator, a thermal expansion valve and a condenser. It is characterized in that the refrigeration unit of each heat pump refrigerator The mass balance forms an independent circulation loop in the order of the compressor, condenser, thermal expansion valve, evaporator and back to the compressor; the condensers of each heat pump refrigerator are connected in series to form a multi-stage series shell-and-tube heat exchange structure. That is to say, the inlet and outlet pipes used for heat exchange in each section of the condenser are connected in series to form a connected inlet and outlet circuit, sharing a water system; the evaporator of the unit adopts a parallel dry-type shell-and-tube heat exchange structure, that is, each unit The evaporators of the heat pump refrigerators share a shell-and-tube heat exchange structure, and the evaporator tubes of each heat pump refrigerator independently pass through the heat exchange tube shell of the same evaporator in a parallel structure, and share a water system.

The compressor of this unit can be a piston compressor or a screw compressor.

The unit can adopt a three-layer structure design, that is, the compressor, evaporator, and condenser are respectively placed on the upper, middle, and lower layers to form a compact integrated structure.

The condenser of this unit should preferably adopt a horizontal structure.

The utility model adopts a reasonable combination of multiple heat pump refrigerators, and the condenser is designed as a multi-section series shell-and-tube heat exchange structure, which can effectively increase the temperature of the hot water output by the condenser. During operation, it can output high-temperature hot water, up to 75°C, so as to meet the requirements of different heating systems and provide higher temperature domestic hot water supply. Both the condenser and the evaporator of this unit adopt the structural design of sharing a water system, which not only helps to improve the energy efficiency of the system, but also simplifies the structure of the entire unit.

Description of drawings

Figure 1 is a schematic structural diagram of the high temperature heat pump refrigeration unit;

Fig. 2 is the actual assembly structure diagram of the embodiment of the high-temperature heat pump refrigeration unit of the present invention.

Detailed ways

As shown in Figure 1, the high-temperature heat pump refrigeration unit is composed of three heat pump high-temperature heat pump refrigerators. Compressors (1a, 1b, 1c) are connected to condensers (5a, 5b, 5c), thermal expansion valves (4a, 4b, 4c) and evaporators 3 (3a, 3b, 3c) respectively through connecting pipes 2, each The refrigeration working medium of a heat pump refrigerator forms an independent circulation loop in the order of the compressor, condenser, thermal expansion valve, evaporator and back to the compressor; the condensers 5a, 5b, and 5c are connected in series to form a three-stage series connection Shell-and-tube heat exchange structure, each condenser has a heat exchange structure composed of an inlet pipe 501 and an outlet pipe 502, the refrigerant flows outside the pipe, and the cooling water flows inside the pipe, and the water inlet pipe used for heat exchange in the three-stage condenser It is connected in series with the front and rear sections of the outlet pipe to form a connected inlet and outlet circuit, sharing a water system, that is, after the cooling water flows into the water inlet pipe of the condenser 5a from the low-temperature water inlet, it flows through the water inlet pipe of the condenser 5a and the inlet pipe of the condenser 5b in sequence. Water pipe, the water inlet pipe of condenser 5c, the water outlet pipe of condenser 5c, the water outlet pipe of condenser 5b, the water outlet pipe of condenser 5a, flow out high-temperature water outlet again. The evaporator 5 is a parallel dry shell-and-tube heat exchange structure, that is, there is a common heat exchange tube shell, and the evaporator tubes 3a, 3b, 3c of the three heat pump refrigerators pass through the common heat exchange tube shell independently in parallel. Cooling water flows into the heat exchange shell from the chilled water inlet, and flows out from the chilled water outlet, sharing a water system. Figure 2 is the assembly structure diagram of the high temperature heat pump refrigeration unit. The whole unit structure is three layers, the upper layer is the compressor 1a, 1b, 1c, the middle layer is the evaporator 3, and the lower layer is the condenser 5a, 5b, 5c. formula structure.

Claims (4)

1. A high-temperature heat pump refrigerating unit for heating, cooling and hot water supply, each heat pump refrigerating machine includes a compressor, an evaporator, a thermal expansion valve and a condenser, and is characterized in that a plurality of heat pump refrigerating machines are combined, The refrigeration working medium of each heat pump refrigerator forms an independent circulation loop in the order of compressor, condenser, thermal expansion valve, evaporator and back to the compressor; the condensers (5a, 5b) of each heat pump refrigerator , 5c) are connected in series to form a multi-stage series shell-and-tube heat exchange structure, that is, the water inlet pipes used for heat exchange in each stage of the condenser and the front and rear sections of the water outlet pipes are connected in series to form a connected inlet and outlet circuit, sharing a water system; The evaporator adopts a parallel dry shell-and-tube heat exchange structure, that is, the evaporators of each heat pump refrigerator share a shell-and-tube heat exchange structure, and the evaporator tubes of each heat pump refrigerator independently exchange heat from the same evaporator in a parallel structure. Pass through the tube shell and share a water system. 2. The high temperature heat pump refrigerating unit according to claim 1, characterized in that said compressor is a piston compressor or a screw compressor. 3. The high-temperature heat pump refrigeration unit according to claim 1, characterized in that the compressor, evaporator, and condenser of the unit are respectively located in the upper, middle and lower layers, forming a three-layer structure. 4. The high-temperature heat pump refrigerating unit according to claim 1 or 3, characterized in that said condenser adopts a horizontal type.

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