CN102563947A - Heat pipe and heat pump combination type refrigerating plant - Google Patents

Abstract

The invention discloses a heat pipe and heat pump combination type refrigerating plant which comprises a condenser (1), a tee valve (2), a throttle valve (3), a check valve (4), a circulating pump I (5), a circulating pump II (6), an evaporator (7), a liquid storage tank (8), a solenoid valve (9), a compressor (10) and a circuit control part; and partial changes are made on the basis of a traditional heat pump type single-refrigerator air conditioner, two liquid pumps, the check valve (4) and the solenoid valve (9) connected on the compressor (10) in parallel are added, and the added parts not only combine the heat pump and heat pipe refrigerating plants, but also overcome the defects of gas-liquid separation during the refrigerating process of the existing heat pump refrigerating plant and improve the refrigerating efficiency.

Description

A heat pipe heat pump combined refrigeration device

technical field

The invention relates to the field of refrigeration and the field of baking and heating, and specifically relates to a heat pipe heat pump combined refrigeration device.

Background technique

Under today's social conditions, heat pump technology is a new energy technology that has attracted much attention all over the world in recent years. The familiar "pump" is a mechanical device that can increase potential energy. For example, a water pump mainly pumps water from a low level to a high level. The "heat pump" is a device that can obtain low-grade heat energy from natural air, water or soil, and provide high-grade heat energy that can be used by people through electricity.

A heat pump is a device that transfers thermal energy from a low-temperature heat source to a high-temperature heat source. The low-temperature heat source usually used in heat pump devices is the medium around us—air, river water, sea water, or the auxiliary working fluid discharged from industrial production equipment. These working fluids often have a temperature close to that of the surrounding medium. The working principle of the heat pump device is the same as that of the compression refrigerator; in the small air conditioner, in order to give full play to its effectiveness, the same set of equipment is used to cool down the air conditioner in summer or heat it in winter. When heating in winter, the evaporator and condenser in the air heater are switched through a reversing valve.

When the air conditioner cools down in summer, it operates under refrigeration conditions. The high-pressure condensate vapor discharged from the compressor enters the condenser. The refrigerant vapor is condensed into liquid, enters the evaporator through the throttling device, and absorbs heat in the evaporator. The indoor air is cooled, and the evaporated refrigerant vapor is sucked by the compressor, and this cycle repeats itself to realize the refrigeration cycle. When heating in winter, the high-pressure refrigerant vapor discharged from the compressor flows into the indoor evaporator (used as a condenser), and the latent heat released when the refrigerant vapor condenses heats the indoor air to achieve the purpose of indoor heating, and the condensed liquid refrigeration The agent flows from the reverse direction through the throttling device into the condenser (used as an evaporator), absorbs external heat and evaporates, and the evaporated steam is sucked by the compressor to complete the heating cycle. In this way, the heat in the outside air (or circulating water) is "pumped" into the room with a higher temperature, so it is called a "heat pump".

This is the common heat pump technology currently on the market. Although it is very mature, due to the diameter of the heat exchange copper tubes in the air conditioner evaporator and condenser, when the air conditioner cools down in summer, it operates under refrigeration conditions, and the high pressure discharged by the compressor The condensing agent vapor enters the condenser, the refrigerant vapor is condensed into a liquid, and then enters the throttling device. The condensing agent entering the throttling device is theoretically the best liquid state, but the heat pump system enters the throttling device during actual operation. The condensing agent is not all in liquid state, and there may be a phenomenon of air leakage. The so-called air leakage means that the gaseous condensing agent compressed by the compressor at high pressure does not completely dissipate heat and cool in the condenser to become liquid, and the condensing agent that has not become liquid is also under high pressure. As the liquid condensate flows to the throttling device, this part of the high-pressure gaseous condensate enters the evaporator after decompression. It is impossible to vaporize in the evaporator, and it is impossible to absorb heat and cool the room temperature, let alone Useful work is done on it, so there is a complete waste of the work done by the compressor on this part of the gaseous condensing agent. The liquid condensate enters the evaporator, absorbs heat in the evaporator, and cools the indoor air. The evaporated refrigerant vapor is sucked into the compressor, and because it is a mechanical action, it cannot be ensured that no liquid condensate is absorbed by the compressor. The inhaled liquid condensate does not absorb the heat in the room and evaporates into a gaseous state, that is to say, this part of the liquid condensate has entered the compressor again and is transported to the condenser without doing any useful work. This phenomenon is called leakage. Liquid, so go round and round, the phenomena of deflation and liquid leakage occur constantly, and these phenomena also bring the waste of part of the mechanical work. When heating in winter, the condenser and evaporator are just interchangeable, which means that as long as the air conditioner is running, there will be a waste of this part of the mechanical work.

The air conditioner is only an application aspect of the heat pump system. At present, the heat pump system is used in the brewing industry, the pharmaceutical industry, the barn part, and the hot water heating, and the heat pump system in these aspects is the same as the heat pump system in the air conditioner. Discouragement and liquid leakage phenomenon, there is a waste of useless work.

The heat pipe technology in the refrigeration (heat) field basically started to develop together with the heat pump technology. The heat exchange of heat pipes belongs to the surface heat exchanger in which the hot fluid and the cold fluid do not contact each other. Its main features are: simple structure, high heat exchange efficiency, basically can directly use the physical value of the heat exchange working medium in the heat pipe to automatically deliver heat, and consume less auxiliary power. Under the condition of transferring the same amount of heat, the metal energy consumption of the heat pipe heat exchanger is less than that of other types of heat exchangers; the pressure loss of the heat exchange fluid passing through the heat exchanger is smaller than that of other heat exchangers. Although heat pipe heat exchange is basically completely energy-saving and automatic, heat pipe technology still has great limitations. The use of heat pipe technology must ensure that the temperature difference between indoor and outdoor is large, and this directly limits the large-scale promotion of heat pipe technology; When using heat pipe technology, the heat exchanger in the heat pipe system must comply with the flow properties of the intermediate heat exchange medium, that is, the height difference between the two heat exchangers must be considered when the heat pipe system is running, which is also the problem when the heat pipe system is used. a limitation.

Contents of the invention

The present invention provides a heat pipe heat pump combined refrigeration device to solve the problems of gas leakage and liquid leakage in the existing heat pump system and some disadvantages when the heat pipe technology is used alone.

A heat pipe heat pump combined refrigeration device, which includes a condenser, a three-way valve, a throttle valve, a one-way valve, a circulation pump 1, a circulation pump 2, an evaporator, a liquid storage tank, a solenoid valve, a compressor, and a circuit control Part; the condenser, three-way valve, throttle valve, evaporator, liquid storage tank and compressor are connected in series in order to form a heat pump refrigeration cycle; the solenoid valve is connected in parallel on the compressor, so that the compression Open the electromagnetic valve when the engine stops running, and still maintain the system circulation; the circulation pump one is connected from the third interface of the three-way valve, and then enters the liquid storage tank; the two circulation pump and the one-way valve are connected At the lower end of the liquid storage tank and the throttle valve, another loop is formed, thus forming a heat pipe heat pump combined refrigeration device.

Taking the air-conditioning heat pump system as an example, two circulation pumps are added to the original heat pump system. These two circulation pumps use gas-liquid pumps that can transport gas and liquid at the same time, and the liquid storage tank is also added to the gas-liquid. A layered gas-liquid separation device, so that the circulating pump can make the condensing agent in the condenser form a small cycle, and the liquid condensing agent that completely dissipates heat enters the small cycle composed of the evaporator and the liquid storage tank through the throttling device, without The heat-dissipating gaseous condensing agent is driven by the circulation pump, separated by the gas-liquid separation device in the liquid storage tank, and then enters the condenser. It can be used directly without doing work on the gaseous condensing agent again, which also avoids the phenomenon of deflation. In the small cycle composed of the liquid storage tank and the evaporator, the gaseous condensing agent that completely absorbs heat is separated by the gas-liquid separation device in the liquid storage tank and then compressed by the compressor and then sent to the condenser and liquid storage. In the small cycle formed by the tank, the liquid condensing agent that does not absorb heat and become gas enters the evaporator again through the circulation pump and enters the next small cycle to reduce the indoor temperature.

The above is the simple principle of the device using the heat pump to work in refrigeration. This invention realizes energy-saving heat pipe refrigeration by connecting a parallel solenoid valve to the compressor. When the heat pipe is used for refrigeration, the compressor is turned off, the solenoid valve is turned on, and other components operate with the heat pump. The working refrigeration mode is the same, so that the energy-saving heat pipe mode that can cool without starting the compressor is realized.

The device can not only cool and heat only, but also can cool and heat at the same time after installing two four-way valves on the device. One or two ports of the four-way valve are connected to the air inlet of the condenser and the air outlet of the evaporator. The other two ports are connected to the confluence pipe of the solenoid valve and the compressor, and the other is connected to the outlet of the liquid storage tank; the two ports of the four-way valve are connected to the liquid outlet of the condenser and the liquid inlet of the evaporator, and the other two are connected to the outlet of the liquid storage tank. One of the two ports is connected to the port of the three-way valve, and the other is connected to the confluence pipeline of the one-way valve and the throttle valve, so that cooling and heating can be performed simultaneously after adding two four-way valves. The circuit control part controls the circuit logic operation and equipment operation switch of the whole device, and can realize automatic start and stop as required.

Description of drawings

Fig. 1 is a simple structure schematic diagram of the cold (hot) type of the refrigeration device;

Figure 2 is a schematic diagram of the simple structure of the cooling and heating type after the four-way valve is added to the refrigeration device;

Fig. 3 is the partially enlarged structural diagram of the dotted line box in Fig. 2;

(1) condenser; (2) three-way valve; (3) throttle valve; (4) one-way valve; (5) circulation pump one; (6) circulation pump two; (7) evaporator; (8) Liquid storage tank; (9) solenoid valve; (10) compressor; (11) four-way valve one; (2) four-way valve two.

Embodiment 1: As shown in Figure 1, a heat pipe heat pump combined refrigeration device includes a condenser (1), a three-way valve (2), a throttle valve (3), a one-way valve (4), a circulation Pump one (5), circulating pump two (6), evaporator (7), liquid storage tank (8), solenoid valve (9), compressor (10) and circuit control part; the condenser (1), The three-way valve (2), throttle valve (3), evaporator (7), liquid storage tank (8) and compressor (10) are connected in series in order to form a heat pump refrigeration cycle; the solenoid valve ( 9) Parallel connection on the compressor (10), so that the solenoid valve (9) can be opened when the compressor (10) stops running, and the system circulation is still maintained; the circulation pump one (5) is connected from the three-way valve (2 ), and then into the liquid storage tank (8); the circulation pump two (6) and the one-way valve (4) are connected to the liquid storage tank (8) and the throttle valve (3) The lower end forms another loop, thus forming a heat pipe heat pump combined refrigeration device.

When the heat pump cooling mode is used, the outlet (22) of the three-way valve (2) is closed, the outlets (21) and (23) are connected, the circulation pump one (5) and the solenoid valve (9) are closed, and the high-pressure gaseous condensate is The condenser (1) releases heat to cool, and the liquid condensate enters the evaporator (7) through the three-way valve (2) and the throttle valve (3) to absorb heat and evaporate, and the liquid condensate absorbs heat in the evaporator (4). The heat evaporates into a low-pressure gaseous condensing agent, and the low-pressure gaseous condensing agent mixed with a little liquid condensing agent enters the liquid storage tank (8), and after being separated by the gas-liquid separation device, the low-pressure gaseous condensing agent is compressed by the compressor (6) and enters condensation In the device (1), the small part of the liquid condensate is pumped again by the circulation pump two (6) and enters the evaporator (7) through the check valve (4) for the next heat absorption cycle, which also avoids the Waste of work caused by leakage of liquid.

When the heat pipe cooling mode is used, the outlet of the three-way valve (23) is closed, the outlets (21) and (22) are opened, the compressor (10) is closed, and the solenoid valve (9) is opened. The gaseous condensing agent releases heat and cools in the condenser (1), and the liquid condensing agent mixed with a little gaseous condensing agent enters the liquid storage tank (8) through the circulating pump 1 (5). Under the action of the gas-liquid separation device, the gaseous condensing agent Separated from the liquid condensing agent, the liquid condensing agent enters the evaporator (4) through the circulation pump 2 (6), while the uncooled gaseous condensing agent enters the next cycle in the condenser (1), avoiding the leakage phenomenon. The resulting waste of work; the liquid condensing agent absorbs heat and evaporates in the evaporator (7) to become a gaseous condensing agent, and the gaseous condensing agent mixed with a little liquid condensing agent enters the liquid storage tank (8) and is separated by the gas-liquid separation device. The gas condensing agent enters the condenser (1), and the small part of the liquid condensing agent is pumped into the evaporator (7) by the circulation pump 2 (6) again for the next heat-absorbing cycle, which also avoids the leakage due to liquid leakage. The waste of work caused by the phenomenon.

Embodiment 2: As shown in Figure 2, after adding two four-way valves, the device can not only cool and heat alone, but also can cool and heat at the same time, and the two ports of the four-way valve (11) are connected to the condenser (1) The air inlet of the evaporator (7) and the gas outlet of the evaporator (7), the other two interfaces are connected to the confluence pipe of the solenoid valve (9) and the compressor (10), and the outlet of the liquid storage tank (8); The two ports of the two-way valve (12) are connected to the liquid outlet of the condenser (1) and the liquid inlet of the evaporator (7). One of the other two ports is connected to the port of the three-way valve (2), and the other is connected to the At the junction of the one-way valve (4) and the throttle valve (3), two four-way valves can be added to cool and heat at the same time.

When the device is cooling, the four-way valve one (11) is switched to the port (111) to communicate with the port (114), and the port (112) is connected to the port (113); the four-way valve two (12) is switched to the port (121) and The interface (124) is connected, and the interface (122) is connected with the interface (123); in this way, the same refrigeration equipment as the first embodiment is formed, and the operating state is also the same as that of the first embodiment.

When the device is heating, the four-way valve one (11) is switched to the port (111) to communicate with the port (121), and the port (113) is connected to the port (114); the four-way valve two (12) is switched to the port (123 ) is connected with the interface (124), and the interface (121) is connected with the interface (122), so that the functions of the condenser (1) and the evaporator (7) in the refrigeration equipment in the first embodiment are reversed, and the condenser ( 1) The function becomes an evaporator, and the function of the evaporator (7) becomes a condenser. Through the exchange of two four-way valves for the interface, the single cooling (heating) device becomes a dual cooling and heating device, which can meet the needs of different industries. , User needs.

In Embodiment 1 and Embodiment 2, the circuit control part realizes the automatic control of the device by controlling the on-off operation of each device in the device, which also realizes the application of heat pump refrigeration (heat) devices in various industries (brewing industry) , pharmaceutical industry, barn technology, air-conditioning appliances, heat pump hot water, etc.) can achieve more efficient and energy-saving effects.

Claims (5)

1. A heat pipe heat pump combined refrigeration device, which includes a condenser (1), a three-way valve (2), a throttle valve (3), a one-way valve (4), a circulating pump (5), and a circulating pump Two (6), evaporator (7), liquid storage tank (8), solenoid valve (9), compressor (10) and circuit control part; the condenser (1), three-way valve (2), section Flow valve (3), evaporator (7), liquid storage tank (8) and compressor (10) are connected in series in order to form a heat pump refrigeration (heat) cycle; the solenoid valve (9) is connected in parallel machine (10), so that the solenoid valve (9) can be opened when the compressor (10) stops running, and the system circulation can still be maintained, and the heat pipe refrigeration (heat) cycle can be carried out; the circulation pump one (5) from the three The third port of the through valve (2) is connected to the liquid storage tank (8); the circulation pump two (6) and the one-way valve (4) are connected to the liquid storage tank (8) and throttling The lower end of the valve (3) forms another circuit, thus forming a heat pipe heat pump combined refrigeration device. 2. A heat pipe heat pump combined refrigeration device according to claim 1, further characterized in that: the liquid storage tank (8) has a gas-liquid separation device inside, so that the gaseous condensing agent and liquid condensing agent are clearly separated . 3. A heat pipe heat pump combined refrigeration device according to claim 1, further characterized in that: said circulating pump 1 (5) and circulating pump 2 (6) both use gas-liquid that can transport gaseous and liquid states at the same time Pump. 4. A heat pipe heat pump combined refrigeration device according to claim 1, further characterized in that: the device can not only refrigerate and heat only, but also can simultaneously refrigerate and heat after installing two four-way valves on the device. Heat, two ports of four-way valve one (11) are connected to the air inlet of the condenser (1) and the air outlet of the evaporator (7), and one of the other two ports is connected to the solenoid valve (9) and the compressor (10) One is connected to the outlet of the liquid storage tank (8); the two ports of the four-way valve two (12) are connected to the liquid outlet of the condenser (1) and the liquid inlet of the evaporator (7), and the other two One of the two ports is connected to the port of the three-way valve (2), and the other is connected to the junction of the one-way valve (4) and the throttle valve (3). In this way, two four-way valves can be used for refrigeration and refrigeration at the same time. hot. 5. A heat pipe heat pump combined refrigeration device according to claim 1, further characterized in that: the circuit control part controls the circuit logic operation and equipment operation switch of the whole device, and can realize automatic start and stop according to needs.

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