CN204806729U - Low warm air of hydrocarbon refrigerant can heat pump set - Google Patents

Abstract

The utility model belongs to the technical field of central air-conditioning, and discloses a hydrocarbon refrigerant low-temperature air energy heat pump unit, which comprises a frame assembly, inside the frame assembly, a shell-and-tube heat exchanger is installed below the fin heat exchanger , the electric control box and the compressor are arranged in turn from left to right under the shell-and-tube heat exchanger, the gas-liquid separator is on the right side of the compressor, and the plate heat exchanger is arranged in the middle of the frame assembly, and the plate heat exchanger The right side of the receiver is the liquid receiver. In order to adapt to the cycle operation of hydrocarbon refrigerants, a supplementary air enthalpy increase pipeline module is added between the compressor and the plate heat exchanger, which includes connecting the plate heat exchanger and There are multiple copper pipes of the compressor, and a check valve, a solenoid valve, and an expansion valve are fixed above the copper pipes. The utility model does not damage the ozone layer, has small isentropic compression specific work, prolongs the service life of the compressor, and can produce domestic hot water and heat at the lowest ambient temperature of -25°C.

Description

Hydrocarbon refrigerant low temperature air energy heat pump unit

technical field

The utility model belongs to the technical field of central air-conditioning, and in particular relates to a hydrocarbon refrigerant low-temperature air-energy heat pump unit.

Background technique

At present, in northern China, domestic hot water is mainly obtained through fuel oil, gas, heat pump units and electric heating in the cold winter. The existing methods of obtaining hot water have disadvantages, which are mainly reflected in the following aspects. 1. High energy consumption, not environmentally friendly, using gas or heat pump units will produce harmful gases to the atmosphere, and heat transfer agents such as fluorine-containing substances are harmful to the ozone layer; 2. High cost, using existing comparative The general-purpose difluorochloromethane has a high unit price; 3. The existing heat-conducting agent has a high freezing point, the cooling rate per unit time is slower, and the isentropic compression specific work is large, which makes the compressor difficult and is not conducive to the service life of the compressor; 4 1. The fluidity is poor, the delivery pressure is high, and the load on the compressor is increased; 5. It is impossible to achieve low-temperature environment heating. How to effectively improve the existing air energy heat pump unit so that it can use hydrocarbon refrigerants for energy transmission and conversion, the above is the technical problem urgently needed to be improved by the existing technicians in this industry.

Utility model content

Aiming at the problems existing in the prior art, the purpose of this utility model is to provide a hydrocarbon refrigerant low-temperature air energy heat pump unit, which can achieve a better warming effect through technical improvement, and can effectively reduce energy consumption, and is environmentally friendly. Pollution, low cost of use, is conducive to the operation of the compressor and can achieve the effect of heating in a low temperature environment.

The technical solution adopted by the utility model to solve the technical problem is: a hydrocarbon refrigerant low-temperature air energy heat pump unit, the outer frame of which is the same as that of the existing ordinary heat pump unit, which includes a frame assembly, and the upper part of the frame assembly Finned heat exchangers are installed on the left and right sides respectively, and an axial flow fan is installed on the top of the finned heat exchanger. Below the shell-and-tube heat exchanger, an electric control box and a compressor are arranged in sequence from left to right. The right side of the compressor is a gas-liquid separator, and the middle part of the frame assembly is provided with a plate heat exchanger. The plate heat exchanger The right side is the liquid receiver. In order to adapt to the cycle operation of hydrocarbon refrigerants, a supplementary air enthalpy increase pipeline module is added between the compressor and the plate heat exchanger, which includes connecting the plate heat exchanger and the compressor. Multiple copper pipes connected to the machine phase, and one-way valves, solenoid valves, expansion valves, and throttle valves fixed on the copper pipes.

The pipeline connection details of the air supply and enthalpy increase pipeline module are that the liquid reservoir is connected to the filter through the copper pipe, and then enters the solenoid valve through the pipeline branch, and then enters the plate heat exchanger through the expansion valve throttling, and connects with the plate heat exchanger. Heat exchanger connection; after the copper pipe branch comes out of the economizer, it is connected with the one-way valve and the expansion valve and is divided into two branches. One branch enters the liquid reservoir again, and the other enters the plate heat exchanger, and then passes through four The one-way valve enters the fin heat exchanger; one branch of the economizer enters the compressor through the pipeline one-way valve, then enters the four-way valve, and enters the vapor-liquid separator after exiting the four-way valve to form a cycle.

Beneficial effects of the present utility model: through research and improvement, the present utility model can use hydrocarbon refrigerant as a medium for heat transfer, and the beneficial effects achieved are: 1. Using hydrocarbon refrigerant does not damage the ozone layer and has no greenhouse effect; 2. It is economical, and by weight, the air energy heat pump unit using hydrocarbon refrigerant instead of R22 refrigerant can save 50% compared with R22; 3. High efficiency and energy saving, low freezing point, and greater latent heat of evaporation, which makes the cooling speed per unit time faster , The isentropic compression ratio is small, which makes the compressor work easier and prolongs the service life of the compressor. The molecular weight is small, the fluidity is good, the delivery pressure is lower, and the compressor load is reduced; 4. Heating in low temperature environment and heating in high temperature environment Water, domestic hot water and heating can be produced at the lowest ambient temperature of -25°C.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is a schematic diagram of the main view structure of the utility model;

Fig. 2 is the utility model side view structural representation;

Fig. 3 is a structural schematic diagram of the utility model looking up;

Fig. 4 is a schematic diagram of the connection and work of the gas supplement and enthalpy increase pipeline modules of the utility model;

In the accompanying drawings, 1. Fin heat exchanger, 2. Axial flow fan, 3. Rack assembly, 4. Shell and tube heat exchanger, 5. Liquid receiver, 6. Vapor-liquid separator, 7. Compressor, 8. Air supply and enthalpy increase pipeline module, 9. Electric control box, 81. Plate heat exchanger, 82. One-way valve, 83. Solenoid valve, 84. Expansion valve, 85. Four-way valve, 86. Filter, 87, economizer, 88, copper pipe.

Detailed ways

Below in conjunction with embodiment the utility model is further described.

A hydrocarbon refrigerant low-temperature air-source heat pump unit, the outer frame of which is the same as that of an existing common heat pump unit, and includes a frame assembly 3, and finned heat exchangers 1 are respectively installed on the upper left and right sides of the inside of the frame assembly 3 , the top of the finned heat exchanger 1 is installed with an axial flow fan 2, inside the frame assembly 3, a shell and tube heat exchanger 4 is installed under the finned heat exchanger 1, and the bottom of the shell and tube heat exchanger 4 An electric control box 9 and a compressor 7 are arranged in turn from left to right, the right side of the compressor 7 is a gas-liquid separator 6, the middle part of the frame assembly 3 is provided with a plate heat exchanger 81, and the right side of the plate heat exchanger 81 The side is the liquid receiver 5. In order to adapt to the cycle operation of hydrocarbon refrigerants, a supplementary air enthalpy increase pipeline module 8 is added between the compressor 7 and the plate heat exchanger 81, which includes a connecting plate heat exchanger 81 and a plurality of copper pipes 88 of the compressor 7, the copper pipes 88 are fixed with a one-way valve 82, a solenoid valve 83, and an expansion valve 84, and the described air supply and enthalpy increase pipeline module 8 is used for hydrocarbon refrigeration The connection details are that the liquid reservoir 5 is connected to the filter 86 through a copper pipe 88, and then enters the solenoid valve 83 through the branch of the pipeline, and then enters the economizer 87 through the expansion valve 84, and is connected with the economizer 87 , the branch of the copper pipe 88 comes out of the economizer 87 and is connected with the check valve 82 and the expansion valve 84 and then divided into two branches, one branch enters the liquid reservoir 5 again, and the other branch enters the plate heat exchanger 81, and then Enter the fin heat exchanger 1 through the four-way valve 85; a branch in the economizer 87 enters the compressor 7 through the one-way valve 82, then enters the four-way valve 85, and enters the vapor-liquid after exiting the four-way valve 85 The separator 6 forms a circulation.

When the utility model works, as shown in Figure 4, the solid line represents refrigeration, and the dotted line represents heating. The valve 84 throttles and enters the plate heat exchanger 81. After evaporating, it exchanges heat with the high-pressure refrigerant liquid in the main circuit in the plate heat exchanger 81, making the refrigerant liquid in the main circuit supercooled, increasing the cooling capacity and heating capacity, and the branch refrigerant flows from The plate heat exchanger 81 evaporates into low-temperature steam and enters the one-way valve 82, and then enters the air supply port of the compressor 7 after coming out of the one-way valve 82, and sprays into the vortex middle cavity of the compressor 7, thereby reducing the exhaust temperature of the compressor 7 , increase the heating capacity, so that the compressor 7 can work normally at a lower ambient temperature.

Claims (2)

1. a carbon-hydrogen refrigerant low-temperature air energy source pump, its outside framework is identical with existing ordinary hot pump assembly structure, it comprises a housing assembly, the housing assembly inner upper left and right sides is separately installed with finned heat exchanger, the top of finned heat exchanger is provided with axial flow blower, it is characterized in that: housing assembly is inner, the below of finned heat exchanger is provided with a case tube heat exchanger, electric cabinet and compressor is disposed with from left to right below described case tube heat exchanger, the right side of compressor is vapour liquid separator, the middle part of housing assembly is provided with plate type heat exchanger, the right side of plate type heat exchanger is reservoir, for adapting to the circulation running of carbon-hydrogen refrigerant, spy adds a tonifying Qi and increases enthalpy ducting module between compressor and plate type heat exchanger, its many copper pipes comprising connecting plate type heat exchanger and be connected with compressor, and the check valve that copper pipe is fixed, magnetic valve, expansion valve, choke valve.

2. carbon-hydrogen refrigerant low-temperature air energy source pump as claimed in claim 1, it is characterized in that: the pipeline joint detail that described tonifying Qi increases enthalpy ducting module is that reservoir connects filter by copper pipe, magnetic valve is entered again by line branching, then enter plate type heat exchanger by expansion valve throttling, and be connected with plate type heat exchanger; Copper pipe branch is divided into two branch roads after economizer is out connected with check valve and expansion valve afterwards, and a branch road enters reservoir again, and an other branch road enters plate type heat exchanger, then enters finned heat exchanger by cross valve; In described economizer, a branch enters compressor by line check valve, and then enters cross valve, and out enters vapour liquid separator afterwards from cross valve, forms circulation.