CN205717678U - A kind of ice storage cold-hot pump system - Google Patents

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to an ice storage heat pump system. The utility model provides an ice-storage heat pump system, which includes a heat exchanger, a refrigeration unit, and an outdoor circulation circuit connected to the refrigeration unit, an indoor circulation circuit and a defrosting circuit; the outdoor circulation circuit includes a first circuit and a second circuit. The second circuit, the refrigeration unit includes an evaporator and a condenser, the condenser is connected to the cooling tower to form the first circuit; the first circuit is equipped with multiple air-cooled heat exchangers arranged in parallel with the cooling tower, and the evaporator is connected to multiple air-cooled heat exchangers. The cold heat exchanger is connected to form the second circuit. This application can realize the function of cooling in summer and heating in winter by combining the air-cooled heat exchanger with the ice storage air conditioning system; It has the characteristics of low power consumption, small engineering quantity, stable and reliable system, and strong practicability. It is especially suitable for the southern region where the heating demand time is short and the load is small.

Description

An ice storage heat pump system

technical field

The utility model relates to the technical field of refrigeration equipment, in particular to an ice storage heat pump system, in particular to an ice storage heat pump system capable of supplying heat in winter.

Background technique

Cold storage technology is the supplement and adjustment of refrigeration technology. The main purpose is to alleviate the contradiction of unbalanced power load during peak and valley periods. It is the best way for the power sector to "cut peaks and fill valleys". With the increasing awareness of environmental protection and energy conservation, since 2010, my country has taken various measures to promote the development of ice storage technology, and many new large buildings are designed to install ice storage energy-saving devices.

The ice storage system has advantages in reducing unit capacity and utilizing the difference in peak and valley electricity prices. However, most ice storage systems are idle in winter, and buildings are heated in other ways, resulting in a certain waste of resources. For this reason, some scholars have grafted ground source heat pump technology and ice storage technology, and designed a new joint operation system of ground source heat pump and ice storage air conditioner, which can not only enable users to use cheap geothermal energy resources in winter, but also Allow users to use the ice storage air conditioner with good comfort for refrigeration. Through the economic analysis of actual engineering projects, it is concluded that in the heating mode, compared with coal-fired boiler heating, the user can save 7.4% of the operating cost; in the cooling mode, compared with the conventional air conditioning system, it can save the user Save 42.7% to 71.4% of operating costs. However, due to the high initial investment of the ground source heat pump, it is not suitable for small and medium-sized refrigeration systems, and the water source heat pump system is easily restricted by the geographical environment and cannot be popularized.

Utility model content

(1) Technical problems to be solved

The purpose of this utility model is to provide a stable and reliable ice-storage heat pump system with less investment and less engineering, so as to solve the problem of large investment amount and easy to be restricted by geographical environment in the existing joint operation system of ground source heat pump and ice-storage air conditioner The problem.

(2) Technical solution

In order to solve the above technical problems, the utility model provides an ice storage heat pump system, which includes a heat exchanger, a refrigerating unit, and an outdoor circulation circuit, an indoor circulation circuit and a defrosting circuit respectively connected to the refrigeration unit; The outdoor circulation loop includes a first loop and a second loop, the refrigerating unit includes an evaporator and a condenser, and the condenser is connected to a cooling tower to form the first loop; the first loop is equipped with multiple An air-cooled heat exchanger arranged in parallel with the cooling tower, and the evaporators are respectively connected with a plurality of air-cooled heat exchangers arranged in parallel to form the second circuit.

Wherein, the condensers are respectively connected to a plurality of the air-cooled heat exchangers arranged in parallel to form the defrosting circuit.

Wherein, the second circuit, the first circuit and the defrosting circuit are all equipped with water pumps and valves.

Wherein, the indoor circulation circuit includes an indoor cooling circuit and an indoor heating circuit.

Wherein, the indoor cooling circuit includes a cooling machine cooling circuit, a cold storage circuit and a cold storage cold supply circuit.

Wherein, the evaporator is connected to the heat exchanger to form the cooling circuit of the refrigerator; the evaporator is connected to the ice tank to form the cold storage circuit; the ice tank is connected to the heat exchanger, The cold storage and cold supply circuit is formed.

Wherein, the cold machine cooling circuit, the cold storage circuit and the cold storage cold supply circuit are provided with water pumps and valves.

Wherein, the indoor heat supply circuit includes a unit heat supply circuit, a heat storage circuit and a heat storage heat supply circuit.

Wherein, the condenser is connected with the heat exchanger to form the heat supply circuit of the unit; the condenser is connected with the hot water tank to form the heat storage circuit; the hot water tank and the heat exchanger connected to form the heat storage and heat supply circuit.

Wherein, the heat supply circuit, heat storage circuit and heat storage heat supply circuit of the unit are provided with water pumps and valves.

(3) Beneficial effects

The above-mentioned technical solution of the utility model has the following advantages: the utility model provides an ice storage heat pump system, which includes a heat exchanger, a refrigeration unit, and an outdoor side circulation loop, an indoor side circulation loop and a defrosting unit respectively connected to the refrigeration unit. loop; the outdoor circulation loop includes a first loop and a second loop, the refrigerating unit includes an evaporator and a condenser, and the condenser is connected to a cooling tower to form a first loop; the first loop is provided with a plurality of parallel cooling towers The air-cooled heat exchanger, the evaporator is connected with multiple air-cooled heat exchangers to form the second loop. The utility model can realize the function of cooling in summer and heating in winter by combining the air-cooled heat exchanger with the ice storage air conditioning system, and improves the utilization rate of the existing ice storage system; The ice storage system is used for heating transformation, and has the characteristics of low investment, low power consumption, small engineering quantity, stable and reliable system, etc., and is practical. It is especially suitable for the southern region where the heating demand time is short and the load is small. It is the solution to the problem in the Yangtze River Basin. An effective new approach to the heating problem.

Description of drawings

Fig. 1 is a schematic diagram of the operating system of an ice storage heat pump system according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the operating system of the heat supply and refrigerant circulation loop of the unit in an ice storage heat pump system according to an embodiment of the utility model;

Fig. 3 is a schematic diagram of the operation system of the heat storage refrigerant circulation loop in an ice storage heat pump system according to an embodiment of the present utility model;

Fig. 4 is a schematic diagram of a defrosting circuit operating system in an ice storage heat pump system according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of the operation system of the heat storage heat supply refrigerant circulation loop in an ice storage heat pump system according to an embodiment of the utility model;

Fig. 6 is a schematic diagram of the operating system when the hot water tank and the heat exchanger are connected in series in an ice storage heat pump system in an embodiment of the utility model under the condition of synchronous storage and supply;

Fig. 7 is a schematic diagram of the operating system when the hot water tank and the heat exchanger are connected in parallel under the condition of synchronous storage and supply in an ice storage heat pump system according to an embodiment of the utility model;

Fig. 8 is a schematic diagram of the operating system of the cold storage bridging agent circulation loop in an ice storage heat pump system according to an embodiment of the present utility model;

Fig. 9 is a schematic diagram of the operation system of the cooling medium circulation circuit of the cooling machine in the ice storage heat pump system according to the embodiment of the present invention;

Fig. 10 is a schematic diagram of an operating system of a cold storage and cooling brine circulation loop in an ice storage heat pump system according to an embodiment of the present invention.

In the figure: 1: condenser; 2: evaporator; 3: cooling tower; 4: hot water tank or ice tank; 5: air-cooled heat exchanger; 6: heat exchanger; 7: defrosting pipeline.

detailed description

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, the embodiment of the utility model provides an ice storage heat pump system, the ice storage heat pump system includes a heat exchanger 6, a refrigeration unit, and an outdoor side circulation loop, an indoor side circulation loop and The defrosting circuit; the outdoor circulation circuit includes the first circuit and the second circuit, the refrigerating unit includes the evaporator 2 and the condenser 1, the outlet of the condenser 1 is connected to the inlet of the cooling tower 3 through a pipeline, and the outlet of the cooling tower 3 passes through The pipeline is connected to the inlet of the condenser 1 to form the first circuit; the first circuit is provided with a plurality of air-cooled heat exchangers 5 arranged in parallel with the cooling tower 3, which can be selected according to the specific required implementation conditions The number of air-cooled heat exchangers 5, the outlet of the evaporator 2 is respectively connected to the inlets of a plurality of air-cooled heat exchangers 5 arranged in parallel through pipelines, and the outlets of a plurality of air-cooled heat exchangers 5 arranged in parallel are respectively connected through pipes. The road is connected with the inlet of the evaporator 2 to form a second circuit. The utility model combines the air-cooled heat exchanger 5 with the ice-storage air-conditioning system, which can simultaneously realize the functions of cooling in summer and heating in winter, and effectively solves the problem that the existing ice-storage system can only provide cooling in summer, effectively The utilization rate of the existing ice storage system is improved, and the waste of resources is avoided; among them, the air-cooled heat exchanger 5 belongs to the air-cooled air source heat pump, and the investment amount is small and is not restricted by the geographical environment. Some ice storage systems are retrofitted with heat supply, and have the characteristics of less investment, low power consumption, small engineering quantity, stable and reliable system, etc., and are highly practical, especially suitable for the southern region where the heating demand time is short and the load is small. It is a solution An effective new approach to the heating problem in the Yangtze River Basin.

Specifically, the outlet of the condenser 1 is respectively connected to the inlets of a plurality of air-cooled heat exchangers 5 through the defrosting pipeline 7, and the outlets of the plurality of air-cooled heat exchangers 5 are respectively connected to the condenser 1 through the defrosting pipeline 7. The outlet connection to form a defrosting circuit. In this embodiment, the outdoor unit of the ice storage heat pump system in this application needs to be defrosted after it is frosted. The circuit under the frost working condition is: divert part of the brine flowing out of the condenser 1 into the defrosting pipeline 7, and flow back through the water pump P2, valve V3, air-cooled heat exchanger H2, valve V17 and valve V9 in sequence condenser1.

In particular, the heat exchanger 6 in this embodiment can be a plate heat exchanger, or a tube heat exchanger, a volumetric heat exchanger, a plate and tube heat exchanger, and the like.

Specifically, water pumps and valves are provided on the second circuit, the first circuit and the defrosting circuit. In this embodiment, the second circuit is: the brine flows out from the evaporator 2, passes through the valve V8, the water pump P1 and a plurality of outdoor heat exchangers 5, and then flows back to the evaporator 2 through the valve V6. The first circuit is: the brine flows out of the condenser 1, and flows back to the condenser 1 through the valve V5, the water pump P1, the valve V1, the valve V20 and the valve V11.

Specifically, the indoor circulation circuit includes an indoor cooling circuit and an indoor heating circuit. By setting an indoor cooling circuit and an indoor heating circuit, the ice storage heat pump system in this application can supply both cooling in summer and heating in winter, which fully improves the utilization rate of the existing ice storage system and reduces waste of resources.

Specifically, the indoor cooling circuit includes a cooling circuit for a refrigerator, a cold storage circuit, and a cold storage circuit; and the cooling circuit for the refrigerator, the cold storage circuit, and the cold storage circuit are all equipped with water pumps and valves. When the heat load is large and the cold storage capacity is not enough to provide the required cooling capacity throughout the day, switch to the direct cooling condition of the chiller, that is, the outlet of the evaporator 2 is connected to the inlet of the heat exchanger 6 through a pipeline, and the heat exchange The outlet of the device 6 is connected with the inlet of the evaporator 2 through a pipeline to form a cooling circuit for the refrigerator. In this embodiment, the refrigerant circulation circuit for the refrigerator can be referred to in FIG. Evaporator 2 flows out, and flows back through valve V10, water pump P3, valve V14, heat exchanger 6, valve 13, and valve V4; when the system uses cold storage at night when the electricity price is low, the outlet of evaporator 2 passes through the pipeline It is connected to the inlet of the ice tank 4, and the outlet of the ice tank 4 is connected to the inlet of the evaporator 2 through a pipeline to form a cold storage circuit. In this embodiment, the cold storage brine circulation circuit can be referred to in FIG. The refrigerant flows out from the evaporator 2 and flows back through the valve V10, the water pump P3, the ice tank 4, the valve V16 and the valve V4; Cooling demand, at this time, the refrigerator stops working, and the ice tank 4 is connected with the heat exchanger 6 to form a cold storage and cold supply circuit. In this embodiment, the cold storage and cold supply refrigerant circulation circuit can be referred to in Figure 10, specifically: The ice tank 4, the valve V15, the heat exchanger 6, the valve V13, the valve V12 and the water pump P3 form a cold storage and cooling circuit.

Specifically, the indoor heat supply circuit includes a unit heat supply circuit, a heat storage circuit and a heat storage heat supply circuit; and the unit heat supply circuit, the heat storage circuit and the heat storage heat supply circuit are all provided with water pumps and valves.

When the heat load is large and the stored heat is not enough to provide the required heat supply throughout the day, switch to the direct heat supply mode of the unit, that is, the outlet of the condenser 1 is connected to the inlet of the heat exchanger 6 through a pipeline, and the heat exchange The outlet of the device 6 is connected with the inlet of the condenser 1 through a pipeline to form a heating circuit of the unit. In this embodiment, the heating refrigerant circulation circuit of the unit can be referred to in FIG. 1 flows back through valve V7, water pump P3, valve V14, heat exchanger 6, valve V13 and valve V9 to form a heating circuit; The outlet is connected to the inlet of the hot water tank 4 through a pipeline, and the outlet of the hot water tank 4 is connected to the inlet of the condenser 1 through a pipeline to form a heat storage circuit. In this embodiment, the heat storage refrigerant circulation circuit can be See Fig. 3, specifically: the brine flows out from the condenser 1 and flows back through the valve V7, the water pump P3, the hot water tank 4, the valve V16 and the valve V9; The heating demand when the electricity price is higher (that is, the electricity price is higher), at this time, the unit stops working, and the hot water tank 4 is connected to the heat exchanger 6 to form a heat storage and heat supply circuit. In this embodiment, the heat storage and heat supply refrigerant The circulation loop can be seen in Fig. 5, specifically: the heat storage and heat supply loop is formed by the hot water tank 4, the valve V15, the heat exchanger 6, the valve V13, the valve V12 and the water pump P3.

In particular, Figure 6 and Figure 7 are both storage and supply synchronous working conditions, that is, when the heating load is small during the day, the higher efficiency of the unit at this time is used to allow the unit to store heat and supply heat at the same time; Figure 6 shows the hot water tank 4 It is connected in series with the heat exchanger 6, and Fig. 7 is a parallel connection between the hot water tank 4 and the heat exchanger 6. The refrigerant circuit in Figure 6 is: the refrigerant flows out from the condenser 1 and flows back through the valve V7, the water pump P3, the hot water tank 4, the valve V15, the heat exchanger 6, the valve V13 and the valve V9, forming a storage supply synchronous loop. The brine circuit in Figure 7 is: brine flows out from the condenser 1 and passes through the valve V7 and the water pump P3; part of the brine flows back through the hot water tank 4, valve V16 and valve V9; the other part flows through the valve V14 and the heat exchanger 6. Valve V13 and valve V9 flow back. In particular, in this embodiment, reference numeral 4 acts as a different functional box under different working conditions. When cooling is required in summer, reference numeral 4 is an ice tank; when heating is required in winter, reference numeral 4 for the hot water tank.

In particular, in this embodiment, when heating is required in winter, the cooling tower and the air-cooled heat exchanger can participate in the second circuit, that is, the cooling tower does not spray water at this moment, and only the fan is needed.

In summary, the utility model provides an ice storage heat pump system, which includes a heat exchanger, a refrigeration unit, and an outdoor circulation circuit, an indoor circulation circuit, and a defrosting circuit respectively connected to the refrigeration unit; the outdoor circulation circuit Including the first circuit and the second circuit, the refrigerating unit includes an evaporator and a condenser, the condenser is connected with the cooling tower to form the first circuit; the first circuit is provided with a plurality of air-cooled heat exchangers arranged in parallel with the cooling tower, The evaporator is connected with multiple air-cooled heat exchangers to form a second circuit. The utility model can realize the function of cooling in summer and heating in winter by combining the air-cooled heat exchanger with the ice storage air conditioning system, and improves the utilization rate of the existing ice storage system; The ice storage system is used for heating transformation, and has the characteristics of low investment, low power consumption, small engineering quantity, stable and reliable system, etc., and is practical. It is especially suitable for the southern region where the heating demand time is short and the load is small. It is the solution to the problem in the Yangtze River Basin. An effective new approach to the heating problem.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (10)

1. An ice-storage heat pump system, characterized in that: it comprises a heat exchanger, a refrigeration unit, and an outdoor circulation circuit, an indoor circulation circuit and a defrosting circuit respectively connected to the refrigeration unit; the outdoor circulation circuit includes The first loop and the second loop, the refrigerating unit includes an evaporator and a condenser, and the condenser is connected with a cooling tower to form the first loop; the first loop is provided with a plurality of The air-cooled heat exchangers arranged in parallel, the evaporators are respectively connected to a plurality of the air-cooled heat exchangers arranged in parallel to form the second circuit. 2. The ice storage heat pump system according to claim 1, wherein the condensers are respectively connected to a plurality of the air-cooled heat exchangers arranged in parallel to form the defrosting circuit. 3. The ice storage heat pump system according to claim 1, characterized in that: the first circuit, the second circuit and the defrosting circuit are provided with water pumps and valves. 4 . The ice storage heat pump system according to claim 1 , wherein the indoor circulation circuit includes an indoor cooling circuit and an indoor heating circuit. 5 . The ice storage heat pump system according to claim 4 , wherein the indoor cooling circuit includes a cooling machine cooling circuit, a cold storage circuit and a cold storage cooling circuit. 6 . 6. The ice storage heat pump system according to claim 5, characterized in that: the evaporator is connected with the heat exchanger to form the cooling circuit of the refrigerator; the evaporator is connected with the ice tank to form the The cold storage circuit; the ice tank is connected with the heat exchanger to form the cold storage and cold supply circuit. 7. The ice storage heat pump system according to claim 5, characterized in that: the cooling circuit of the chiller, the cold storage circuit and the cold storage and cooling circuit are all equipped with water pumps and valves. 8 . The ice storage heat pump system according to claim 4 , wherein the indoor heat supply circuit includes a unit heat supply circuit, a heat storage circuit and a heat storage heat supply circuit. 9 . 9. The ice storage heat pump system according to claim 8, characterized in that: the condenser is connected with the heat exchanger to form the heat supply circuit of the unit; the condenser is connected with the hot water tank to form the The heat storage circuit; the hot water tank is connected to the heat exchanger to form the heat storage and heat supply circuit. 10. The ice-storage heat pump system according to claim 8, characterized in that: the heat supply circuit of the unit, the heat storage circuit and the heat storage and heat supply circuit are all equipped with water pumps and valves.