JP2002286322A - Device utilizing solar heat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a necessary heating ability and efficiently perform a heating operation without depending on the quantity of solar radiation and outside air temperature. SOLUTION: A device utilizing solar heat comprises a solar heat collector 24, an air supply means 25, a heat pump circuit 19 having a capacity variable compressor 20, an evaporator 23 of the heat pump circuit 19 for performing a heat exchange with air passing through the solar heat collector 24 a heat collector inlet air temperature sensor 33, an evaporator refrigerant inlet temperature sensor 34, and a compressor capacity variable control means 32 for setting rotating speed of a compressor 22 so that evaporator refrigerant inlet temperature is substantially equal to heat collector inlet air temperature. Thus, the high temperature air receiving solar heat in the solar heat collector is supplied to the evaporator, so that the evaporating temperature rises to outstandingly increase the efficiency of the heat pump.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar heat utilization apparatus for supplying hot water or heating with a heat pump which is operated by using solar heat when the weather is fine and by using external heat when the weather is bad.

[0002]

2. Description of the Related Art Conventionally, as this type of solar heat utilizing apparatus, there has been a solar heat utilizing apparatus described in, for example, JP-A-59-107150 or JP-A-61-7768. . FIG. 12 and FIG. 13 show a conventional solar water heater using solar heat described in the above publication.

In FIG. 12, 1 is a hot water storage tank for storing hot water by exchanging heat with a heat pump circuit, 2 is a refrigerant return pipe,
Reference numeral 3 denotes a compressor, 4 denotes a condenser arranged below the hot water storage tank 1, 5 denotes a throttle provided in the refrigerant outgoing pipe 2a, 6 denotes an evaporator, and has heat collecting fins 7, 8 denotes a heat collecting heat exchanger section. A heat collecting chamber 9 having a closed structure is provided, the sun side of which is sealed with a glass plate 10, an evaporator 6 and a blower 11 are arranged in the heat collecting chamber 9, and dampers 12, 13 are provided with external air. It can be opened and closed.

[0004] Further, in FIG.
A glass plate 10 on the sunlight receiving surface of the outer box 14, a heat collecting plate 15 arranged to partition the inside of the outer box into a front side and a back side, an air inlet 16 opened in front of the front side of the heat collecting plate 15, An air return port 17 on the opposite side of the air inlet 16, an exhaust port 18 opened on the back surface of the outer case 14 near the air inlet 16,
The blower 11 and the evaporator 6 of the heat pump device are arranged inside the exhaust port 18.

[0005]

However, FIG.
In the conventional configuration shown in FIG. 1, the entire surface of the evaporator 6 of the heat pump receives solar heat, and the evaporator 6 needs to be spread over the entire required heat collecting area. In addition to an increase in the amount of refrigerant charged in the heat pump, the required amount of air in the case of using only the air heat source is several times larger than in the case of a normal heat pump, and the driving power of the blower 11 is increased.

In the conventional configuration shown in FIG. 13, the air is heated by the solar heat with the heat collecting plate 15 and the heated and heated air is sent to the evaporator 6 of the heat pump. Although there is an advantage that the size may be equivalent to that of the heat pump described above, there is a problem that the heating capacity is increased more than necessary as the amount of solar radiation increases.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a solar heat utilization apparatus which can reduce the size of an evaporator for receiving solar heat and can perform an efficient heating operation.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a solar heat collector, a heat pump circuit having a variable capacity compressor, and heat exchange with air passing through the solar heat collector. An evaporator for the heat pump circuit, a heat collector inlet air temperature sensor for detecting an air temperature at an inlet of the solar heat collector, an evaporator inlet refrigerant temperature sensor for detecting a refrigerant inlet temperature of the evaporator, and an evaporator. The solar heat utilization apparatus includes a compression function variable power control means for setting the capacity of the variable capacity compressor so that the inlet refrigerant temperature is substantially equal to the collector air inlet temperature.

This eliminates the need to receive direct solar radiation from the evaporator of the heat pump circuit, so that the size of the evaporator can be reduced to a size equivalent to that of a normal heat pump circuit. Further, by setting the rotation speed of the compressor so that the evaporator inlet refrigerant temperature is substantially equal to the heat collector inlet air temperature, high-temperature air that has received solar heat from the heat collector is supplied to the evaporator. As a result, the evaporation temperature is increased, and the efficiency (COP) of the heat pump can be significantly increased.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a solar heat collector, a heat pump circuit having a variable capacity compressor, and a heat pump circuit for exchanging heat with air passing through the solar heat collector. An evaporator, a heat collector inlet air temperature sensor for detecting an inlet air temperature of the solar heat collector, an evaporator inlet refrigerant temperature sensor for detecting an evaporator inlet refrigerant temperature, and a heat collector for evaporator inlet refrigerant temperature. And a variable compression function force control means for setting the capacity of the variable capacity compressor so as to be substantially the same as the unit inlet air temperature.

In the above embodiment, since it is not necessary to receive direct solar radiation from the evaporator of the heat pump circuit, the size of the evaporator can be reduced to a size equivalent to that of a normal heat pump circuit. Further, by setting the rotation speed of the compressor so that the evaporator inlet refrigerant temperature is substantially equal to the heat collector inlet air temperature, high-temperature air that has received solar heat from the heat collector is supplied to the evaporator. Therefore, the evaporating temperature increases, and the efficiency (COP) of the heat pump can be significantly increased.

[0012] According to a second aspect of the present invention, in the first aspect, the compression function force variable control means is provided with a predetermined compressor rotation speed when the compressor rotation speed set value is lower than the minimum rotation speed. The compressor is operated in accordance with the following.

In the above embodiment, the shortage of heat from the solar heat collector to be received by the heat pump circuit is detected, and even if the amount of solar radiation is small or not at all, the required heating capacity and high efficiency are obtained. Since the compressor can be operated by setting the rotation speed of the compressor in an optimum state in advance, the heating capacity of the heat pump circuit can be ensured, and efficient heating operation can be performed.

According to a third aspect of the present invention, in the first aspect, a solar calorie detecting means is provided, and the compression function force variable control means is provided when the solar calorific value by the solar caloric detecting means falls below a predetermined value. This is a preset compressor rotation speed.

In the above-described embodiment, even if the amount of solar heat is detected or the amount of solar radiation is small or not at all, the operation is performed by presetting the necessary heating capacity and the number of revolutions of the compressor in an optimum state with high efficiency. As a result, the heating capacity of the heat pump circuit is secured, and an efficient heating operation can be performed.

According to a fourth aspect of the present invention, in the second or third aspect, the compression function force variable control means adjusts the preset compressor rotation speed to a fixed compression speed corresponding to the maximum heating load of the heat pump. Even if the amount of solar radiation is low or not at all,
The necessary heating capacity can be secured by an efficient heat pump circuit.

According to a fifth aspect of the present invention, in accordance with the second or third aspect, an evaporator inlet air temperature sensor for detecting an inlet air temperature of the evaporator is provided, and the compression function force variable control means is set in advance. The determined compressor rotational speed is a compressor rotational speed set based on the evaporator inlet air temperature detected by the evaporator inlet air temperature sensor.

In the above embodiment, the heating capacity and efficiency (COP) of the heat pump are determined based on data measured in advance using characteristics determined by the evaporator inlet air temperature and the compressor rotation speed. Based on the temperature, it is possible to set the required heating capacity and the number of revolutions of the compressor in an optimal and efficient state and operate the compressor, so that the heating capacity of the heat pump can be reduced even when the amount of solar radiation is small or not at all. A secure and efficient heating operation can be performed.

According to a sixth aspect of the present invention, in the second or third aspect, an evaporator inlet air temperature sensor for detecting an evaporator inlet air temperature and an outlet air temperature of the evaporator are detected. An evaporator outlet air temperature sensor, wherein the compression function force variable control means detects a preset compressor speed by the evaporator inlet air temperature sensor and an evaporator inlet air temperature T3; Difference T3-T from the evaporator outlet air temperature T4 detected by
Reference numeral 4 denotes a compressor speed at which a predetermined temperature difference is set in advance.

In the above-described embodiment, a predetermined difference between the inlet and outlet air temperature of the evaporator is required by utilizing the heat exchange amount of the evaporator, that is, the heating capacity of the heat pump circuit, based on the difference between the inlet and outlet air temperature of the evaporator and the air flow. By setting it to a value to obtain a large amount of heating, regardless of the outside air temperature and the amount of solar radiation,
The required heating capacity is obtained. Also, even with a small amount of solar radiation,
As the evaporator inlet air temperature rises, the rotational speed of the compressor is reduced in order to obtain a predetermined temperature difference, the evaporator temperature rises, and the coefficient of performance (efficiency) of the heat pump increases. Therefore, even if there is little or no solar radiation, ensure the heating capacity of the heat pump circuit,
In addition, efficient heating operation can be performed.

According to a seventh aspect of the present invention, in the second or third aspect, an evaporator inlet air temperature sensor for detecting an evaporator inlet air temperature and an evaporator for detecting an evaporator inlet refrigerant temperature are provided. And an inlet refrigerant temperature sensor,
The compression function force variable control means sets a preset compressor rotation speed to an evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor and an evaporator inlet refrigerant temperature T2 detected by the evaporator inlet refrigerant temperature sensor. Temperature difference T3-T2
Is the compressor speed at which a predetermined temperature difference is set in advance.

In the above-described embodiment, the heat exchange amount of the evaporator, that is, the heating capacity of the heat pump is determined by the temperature difference between the inlet air temperature of the evaporator and the refrigerant temperature at the evaporator inlet. By setting the predetermined temperature difference to a value for obtaining a required heating amount, a required heating capacity can be obtained regardless of the outside air temperature and the amount of solar radiation.

Further, even with a small amount of solar radiation, the evaporator inlet air temperature rises, so that the predetermined temperature difference is reached, so that the number of revolutions of the compressor is reduced, and the evaporator temperature rises. The coefficient of performance (efficiency) of the heat pump circuit increases. Therefore, even when the amount of solar radiation is small or not at all, the heating capacity of the heat pump circuit is ensured, and an efficient heating operation can be performed.

According to an eighth aspect of the present invention, in the third aspect, there is provided a heat collector outlet air temperature sensor for detecting a heat collector outlet air temperature T5 of the solar heat collector, and the solar heat amount detecting means is provided as a collector. The air conditioner has a collector inlet / outlet air temperature difference comparing means for comparing a collector inlet / outlet air temperature difference between the heater inlet air temperature T1 and the collector outlet air temperature T5.

In the above embodiment, by utilizing the temperature rise value of the solar heat collector which is directly related to the amount of solar heat,
Reliable control is possible. In addition, since the heat collector inlet air temperature sensor and the heat collector outlet air temperature sensor can be shared with other control functions, there is an effect of cost reduction by sharing parts.

According to a ninth aspect of the present invention, there is provided the solar heat collector according to any one of the first to eighth aspects, wherein the solar heat collector and the evaporator are provided adjacent to each other. There is no heat loss and ventilation resistance in the passage from the to the evaporator, and there is an energy saving effect by improving the heat exchange efficiency and reducing the power of the blower.

[0027] According to a tenth aspect of the present invention, in accordance with any one of the first to ninth aspects, an openable and closable means for sucking outside air into an air inlet of the evaporator; Opening / closing control means for controlling opening / closing.

In the above embodiment, if necessary,
Bypassing the solar heat collector, reducing ventilation resistance and realizing power saving of the ventilation means. Therefore, in a design for increasing the area of the solar heat collector or increasing the length of the air flow path flowing through the surface of the solar heat collector to collect a large amount of solar heat, downsizing of the blowing means and power saving are realized. In particular, when the amount of solar radiation is small, the amount of air passing through the evaporator can be secured to improve the efficiency of the heat pump operation.

[0029] According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, the air flow generated by the blowing means is a motor of the blowing means, a solar heat collector,
The blower, the solar heat collector, and the evaporator are installed so as to pass in the order of the evaporator.

In the above embodiment, the heat required by the blower is effectively used for heating the refrigerant because the heat released from the blower is received by the air sent from the solar heat collector to the evaporator and the heat is exchanged by the evaporator. Solar heat utilizing device.

[0031]

Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, components having the same configuration and the same operation and effect will be denoted by the same reference numerals, detailed description thereof will be omitted, and different portions will be mainly described.

(Embodiment 1) FIG. 1 is a configuration diagram showing a solar heat utilization apparatus according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 19 denotes a heat pump circuit, and a variable capacity compressor 20;
It comprises a condenser 21, a throttle 22, and an evaporator 23. 2
4 is a solar heat collector disposed on the windward side of the evaporator 23;
Is a blower that conveys air from the solar heat collector 24 to the evaporator 23; 26 is a motor that drives the blower 25;
Denotes a water storage tank, and 28 denotes water in the water storage tank 27 in the condenser 21.
A water circuit circulating so as to exchange heat with the water circuit 29 is a water circuit 2
The circulating pumps arranged at 8 and 30, 31 are water storage tanks 27
A supply and discharge pipe for supplying water to and discharging hot water, 32 is a compression function force variable control means composed of a microcomputer or the like for variably controlling the compressor rotation speed of the variable capacity compressor 20,
It has a temperature comparison unit 35 and a first rotation speed setting unit 36. 33 is a heat collector inlet air temperature sensor for detecting the heat collector inlet air temperature T1, 34 is an evaporator inlet refrigerant temperature sensor for detecting the evaporator inlet refrigerant temperature T2, and the temperature comparator 35 is a heat collector inlet air temperature. The temperature T1 is compared with the evaporator inlet refrigerant temperature T2. The first rotation speed setting unit 36 compares the heat collector inlet air temperature T1 with the evaporator inlet refrigerant temperature T2 in a temperature comparator 35, and based on the comparison, determines the evaporator inlet refrigerant temperature T2 as the heat collector inlet temperature. The rotational speed of the variable capacity compressor 20 is set so as to be substantially the same as the air temperature T1, and the temperature comparing unit 35 and the first rotational speed setting unit 36 constitute the compression function force variable control means 32. It is.

The operation and operation of the solar heat utilization apparatus having the above-described configuration will be described below. First, the blowing means 25 is operated to allow the air sucked from the outside to pass through the solar heat collector 24 and the evaporator 23 in this order as indicated by a dotted arrow. Then, the air heated by the solar heat collector 24 in the passage process passes through the variable capacity compressor 2 when passing through the evaporator 23.
0 gives heat to the refrigerant circulating in the heat pump circuit 19.

The refrigerant that has received heat in the evaporator 23 is
By heating the circulating water circulated from the water storage tank 27 by the circulation pump 29 by heating the pressurized temperature by the variable capacity compressor 20 and condensing the refrigerant in the condenser 21, the hot water can be stored in the water storage tank 27. it can. This hot water can be taken out from the supply and discharge pipes 30 and 31 and used for hot water supply or heating.

When the apparatus is in operation, the temperature comparing section 35 of the compression function force variable control means 32 compares the heat collector inlet air temperature T1 detected by the heat collector inlet air temperature sensor 33 with the evaporator inlet air temperature. The evaporator inlet refrigerant temperature T2 detected by the refrigerant temperature sensor 35 is compared with the evaporator inlet refrigerant temperature T2. If the evaporator inlet refrigerant temperature T2 is lower than the heat collector inlet air temperature T1, the first engine speed setting unit 36 changes the capacity. The rotation speed of the compressor 20 is shifted in a smaller direction.

Conversely, when the evaporator inlet refrigerant temperature T2 is higher than the heat collector inlet air temperature T1, the first rotation speed setting unit 36 shifts the rotation speed of the variable capacity compressor 20 to a higher direction. Let it. Thus, the evaporator inlet refrigerant temperature T
2 is controlled so that the rotation speed of the variable capacity compressor 20 becomes substantially equal to the collector inlet air temperature T1.

Therefore, by making the evaporator inlet refrigerant temperature T2 substantially the same as the heat collector inlet air temperature T1, the high temperature air that has received the solar heat from the solar heat collector 24 can be used.
Is supplied to the evaporator, the evaporation temperature increases, and the efficiency (COP) of the heat pump circuit 19 can be dramatically increased.

As described above, in the present invention,
A heat pump circuit 19 having a solar heat collector 24, a variable capacity compressor 20, an evaporator 23 of the heat pump circuit 19 for exchanging heat with air passing through the solar heat collector 24, and a variable compression function force control means 32. With this configuration, it is not necessary to receive direct solar radiation from the evaporator 23 of the heat pump, so that the size of the evaporator 23 can be reduced to a size equivalent to that of a normal heat pump circuit.

Further, a temperature comparison unit 35 and a first rotation speed setting unit 36 are provided in the compression function force variable control means 32 so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1. By setting the number of rotations of the variable capacity compressor 20, high-temperature air that has received solar heat from the solar heat collector 24 is supplied to the evaporator 23, so that the evaporation temperature increases,
The efficiency (COP) of the heat pump circuit 19 can be greatly increased.

(Embodiment 2) FIG. 2 is a configuration diagram showing a solar heat utilization apparatus according to Embodiment 2 of the present invention. The invention of this embodiment includes a minimum rotation speed comparison unit and a second rotation speed setting unit in order to secure the heating capacity of the heat pump circuit even when the amount of solar radiation on a cloudy day or a rainy day is small or not. It differs from the invention of the first embodiment shown in FIG. 1 in that it is added to the variable compression force control means of the first embodiment shown in FIG.

In FIG. 2, the compression function force variable control means 3
2 is a temperature comparison unit 35, a first rotation speed setting unit 36, and a minimum rotation speed comparison unit 37 that further stores a minimum rotation speed of a reference value to be compared with the rotation speed of the variable capacity compressor 20; ,
A preset compressor speed, for example, heat pump circuit 1
And a second rotation speed setting unit 38 which sets a fixed compressor rotation speed corresponding to the maximum heating load of No. 9.

The operation and the operation of the solar heat utilization apparatus constructed as described above are performed by the heat pump circuit 19 by the variable capacity compressor 20 in the same manner as described in the first embodiment.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is heated by the air heated by the solar heat collector 24 to increase the evaporating temperature, and the temperature comparison unit 35 of the compression function force variable control unit 32 and the The number of revolutions of the variable capacity compressor 20 is set by the one revolution number setting unit 36 so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

Further, the compressor rotation speed set value set by the first rotation speed setting unit 36 is compared with the minimum rotation speed by the minimum rotation speed comparison unit 37. The variable capacity compressor 20 is operated according to the compressor rotation speed preset by the second rotation speed setting unit 38.

That is, the fact that the compressor rotation speed set by the first rotation speed setting unit 36 is lower than the minimum rotation speed means that the amount of solar radiation of the sun decreases and the amount of heat collected by the solar heat collector 24 decreases. This indicates that the amount of heat from the solar heat collector 24 to be received by the heat pump circuit 19 is insufficient, and the heating capacity of the heat pump circuit 19 is insufficient.

Therefore, the variable-compression-force control means 32 operates the variable-capacity compressor 20 by switching to the compressor rotation speed preset by the second rotation-speed setting unit 38 so that the necessary heating capacity can be secured. It is.

As described above, the invention of this embodiment detects the shortage of heat from the solar heat collector 24 to be received by the heat pump circuit 19 and detects a small amount of solar radiation on cloudy or rainy days, or Even if there is no compressor at all, the required variable heating capacity, efficient variable capacity compressor 2 in the optimal state
Since the operation can be performed with the number of rotations set to 0 in advance, the heating capacity of the heat pump circuit 19 is ensured, and
Efficient heating operation is possible.

Further, since the compressor rotation speed set in advance by the second rotation speed setting unit 38 is set to a fixed compressor rotation speed corresponding to the maximum heating load of the heat pump, the sun speed can be reduced on cloudy or rainy days. Even if the amount of solar radiation is small or not at all, the necessary heating capacity can be reliably ensured by an efficient heat pump circuit.

(Embodiment 3) FIG. 3 is a block diagram showing a solar heat utilization apparatus according to Embodiment 3 of the present invention. The invention of the present embodiment is provided with a solar heat amount detecting means, and a solar heat amount comparing means, in order to secure the heating capability of the heat pump circuit even when the amount of solar radiation on a cloudy day or a rainy day is small or no. The present embodiment differs from the second embodiment shown in FIG. 2 in that it is added to the variable control means.

In FIG. 3, reference numeral 39 denotes a solar heat detecting means such as a pyranometer. Variable compression function force control means 32
Is a reference value which is a reference value to be compared with the solar heat amount detected by the solar heat amount detecting means 39 in addition to the temperature comparing unit 35, the first rotational speed setting unit 36, and the second rotational speed setting unit 38. A solar heat amount comparing means 40 storing the predetermined value.

In the solar heat utilization apparatus constructed as described above, the operation and operation are the same as described in the first embodiment, and the heat pump circuit 19 is operated by the variable capacity compressor 20.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is heated by the air heated by the solar heat collector 24 to increase the evaporating temperature, and the temperature comparison unit 35 of the compression function force variable control unit 32 and the The number of revolutions of the variable capacity compressor 20 is set by the one revolution number setting unit 36 so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

Then, the solar heat amount detected by the solar heat amount detecting means 39 is compared with a predetermined value set in advance by the solar heat amount comparing means 40, and if the detected solar heat amount is lower than the predetermined value, the second The variable capacity compressor 20 is operated according to the compressor rotation speed set in advance by the rotation speed setting unit 38. That is, when the amount of solar heat is lower than the predetermined value, the amount of heat collected by the solar heat collector 24 decreases, indicating that the amount of heat from the solar heat collector 24 to be received by the heat pump circuit 19 is insufficient. Insufficient heat pump heating capacity.

Therefore, the variable compressor function 20 is operated by switching to a preset compressor rotation speed by the variable compression function force control means 32 so that the required heating capacity can be secured. That is, even if the amount of solar heat is detected and the amount of solar radiation is small or not at all, the required variable heating capacity and the number of revolutions of the variable capacity compressor 20 in an optimum state with high efficiency can be set and operated. For this reason, the heating performance of the heat pump circuit can be ensured and the heating operation can be performed efficiently.

In the second rotation speed setting section 38, the predetermined rotation speed of the compressor is set to a fixed rotation speed corresponding to the maximum heating load of the heat pump. Even if the amount of solar radiation is small or not at all, the necessary heating capacity can be ensured with an efficient heat pump.

(Embodiment 4) FIG. 4 is a configuration diagram showing a solar heat utilization apparatus according to Embodiment 4 of the present invention, and FIG. 5 is a characteristic diagram for explaining general characteristics of a heat pump using a variable capacity compressor. . The invention of the present embodiment is provided with an evaporator inlet air temperature sensor, and a compression function force variable control means, in order to secure the heating capacity of the heat pump circuit even when the amount of solar radiation is small or not on cloudy or rainy days. 2 in that the second rotation speed setting unit of FIG.
Are different from the invention of the second embodiment shown in FIG.

In FIG. 4, reference numeral 41 denotes an evaporator inlet air temperature sensor for detecting the evaporator inlet air temperature T3 of the evaporator 23. The compression function force variable control means 32 further includes an evaporator inlet air temperature detected by the evaporator inlet air temperature sensor 41 in addition to the temperature comparison unit 35, the first rotation speed setting unit 36, and the minimum rotation speed comparison unit 37. A second rotation speed setting unit 38a having a rotation speed calculation unit 42 with a table for calculating the compressor rotation speed based on T3 is provided. That is,
The rotation speed calculation unit 42 calculates the rotation speed of the variable capacity compressor 20 in the optimum state with the required heating capacity and efficiency, based on the evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor 41. According to the general characteristics of the heat pump shown in FIG. 5, when the evaporator inlet air temperature T3 is low, the rotation speed of the variable capacity compressor 20 is increased, and when the evaporator inlet air temperature T3 is high, the rotation speed of the variable capacity compressor 20 is increased. Is provided with a table for setting small.

The operation and the operation of the solar heat utilization apparatus constructed as described above are the same as those described in the first embodiment, and the heat pump circuit 19 is operated by the variable capacity compressor 20.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is heated by the air heated by the solar heat collector 24 to increase the evaporating temperature, and the temperature comparison unit 35 of the compression function force variable control unit 32 and the The number of revolutions of the variable capacity compressor 20 is set by the one revolution number setting unit 36 so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

When the amount of heat from the solar heat collector 24 to be received by the heat pump circuit 19 is insufficient, the compressor rotation speed set by the first rotation speed setting unit 36 becomes the minimum rotation speed of the minimum rotation speed comparison unit 37. , The process proceeds to the second rotation speed setting unit 38a.

The compressor rotation speed setting is performed by the second rotation speed setting unit 3
After shifting to 8a, the rotation speed calculation unit 42 of the second rotation speed setting unit 38a, based on the data measured in advance, based on the evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor 41, The operation of the variable capacity compressor 20 is controlled by calculating the number of rotations of the compressor.

That is, the rotation speed calculation unit 42 calculates as follows. As shown in FIG. 5, as the general characteristics of the heat pump, as the evaporator inlet air temperature T3 increases, both the heating capacity and the efficiency (COP) increase, and as the rotation speed of the compressor 20 increases, the heating capacity increases. However, it has a characteristic that the efficiency is reduced. For example, when the required heating capacity is set to be constant, as shown in FIG. 5, the rotation speed of the compressor 20 is increased when the evaporator inlet air temperature T3 is low, and when the evaporator inlet air temperature T3 is high, as shown in FIG. By setting the number of revolutions of the compressor 20 to be small, the compressor 20 in the optimum state with the necessary heating capacity and efficiency can be obtained.
Can be operated by setting the number of rotations.

As described above, in the invention of this embodiment, the evaporator inlet air temperature for detecting the evaporator inlet air temperature of the evaporator 23 is determined by the compressor speed preset by the second speed setting unit 38a. A temperature sensor 41 is provided, and the operation of the compressor 20 is controlled at a predetermined number of revolutions set based on the temperature detected by the evaporator inlet air temperature sensor 41. Accordingly, the heating capacity and efficiency (COP) of the heat pump circuit 19 are determined based on the evaporator inlet air temperature based on data measured in advance, using the characteristics determined by the evaporator inlet air temperature and the compressor rotation speed. Since the compressor 20 can be operated by setting the required heating capacity and the number of revolutions of the compressor 20 in an optimal state with high efficiency, the heating capacity of the heat pump is ensured even when the amount of solar radiation is small or not at all. In addition, an efficient heating operation can be performed.

(Embodiment 5) FIG. 6 is a block diagram showing a solar heat utilization apparatus according to Embodiment 5 of the present invention. The invention of this embodiment is provided with an evaporator inlet air temperature sensor and an evaporator outlet air temperature sensor in order to secure the heating capacity of the heat pump circuit even when the amount of solar radiation is small or no on a cloudy day or a rainy day. And a second rotational speed setting unit of the compression function force variable control means, a temperature difference comparing unit for comparing the temperature difference detected by the two sensors with a stored predetermined temperature difference, and an evaporator inlet refrigerant rotational speed. Fig. 2
Are different from the invention of the second embodiment shown in FIG.

In FIG. 6, reference numeral 43 denotes an evaporator outlet air temperature sensor. The compression function force variable control means 32 includes an evaporator inlet air temperature T3 and an evaporator outlet air temperature sensor detected by the evaporator inlet air temperature sensor 41, in addition to the temperature comparing unit 35 and the first rotation speed setting unit 36. A temperature difference comparing section 44 for comparing a temperature difference T3-T4 between the evaporator outlet air temperature T4 detected by the sensor 43 and a stored predetermined temperature difference; A second rotation speed setting unit 38b is provided which includes a rotation speed setting unit 45 that controls the rotation speed of the variable capacity compressor 20 so as to make a difference.

The operation and operation of the solar heat utilization apparatus having the above-described configuration are the same as those described in the first embodiment.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is heated by the air heated by the solar heat collector 24 to increase the evaporating temperature, and the temperature comparison unit 35 of the compression function force variable control unit 32 and the The number of revolutions of the variable capacity compressor 20 is set by the one revolution number setting unit 36 so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

If the amount of heat from the solar heat collector 24 to be received by the heat pump circuit 19 is insufficient, the compressor rotation speed is shifted to the second rotation speed setting unit 38b, and the second rotation speed setting unit 38b is operated.
In the temperature difference comparison unit 44 of the rotation speed setting unit 38b, the temperature of the evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor 41 and the temperature of the evaporator outlet air temperature T4 detected by the evaporator outlet air temperature sensor 43 The difference T3-T4 is compared with a preset predetermined temperature difference stored in the rotation speed setting unit 45.

The rotation speed setting section 45 determines the temperature difference T.
When 3-T4 is larger than the predetermined temperature difference, the rotation speed of the variable capacity compressor 20 is shifted to a smaller direction. When the temperature difference T3-T4 is smaller than the predetermined temperature difference,
The rotational speed of the variable capacity compressor 20 is controlled such that the temperature difference T3-T4 becomes a predetermined temperature difference by shifting the rotational speed of the variable capacity compressor 20 to a larger direction.

Therefore, the air volume of the heat pump circuit 19 is constant, and the air temperature difference T3-
If T4 is constant, the amount of heat exchange in the evaporator 23 is constant, that is, the heating capacity of the heat pump circuit 19 is also constant. For example, the evaporator 2 according to the required heating amount
If the air temperature difference between the inlet and outlet of 3 is set in advance as a predetermined temperature difference, by controlling the rotation speed of the variable capacity compressor 20 so that the temperature difference T3-T4 becomes the predetermined temperature difference, The required amount of heating is always obtained.

When the air volume changes, a temperature difference corresponding to the air volume may be set as a predetermined temperature difference.

As described above, in the invention of this embodiment,
An evaporator inlet air temperature sensor 41 for detecting an evaporator inlet air temperature of the evaporator 23 by setting a preset compressor rotation speed.
A temperature T3 detected by the evaporator inlet air temperature sensor 41 and a temperature T4 detected by the evaporator outlet air temperature sensor 43. And the temperature difference T3-T
In this configuration, the number of revolutions of the compressor is controlled so that the predetermined temperature difference 4 becomes a predetermined temperature difference.

By using the characteristic that the heat exchange amount of the evaporator, that is, the heating capacity of the heat pump circuit, is determined by the difference between the inlet and outlet air temperature of the evaporator 23 and the air flow, a predetermined difference between the evaporator inlet and outlet air temperature is required. By setting to a value for obtaining the amount, the necessary heating capacity can be obtained regardless of the outside air temperature and the amount of solar radiation.

Therefore, even when the amount of solar radiation is small or not at all, the heating capacity of the heat pump is secured and
Efficient heating operation is possible.

(Embodiment 6) FIG. 7 is a configuration diagram showing a solar heat utilization apparatus according to Embodiment 6 of the present invention. The invention of this embodiment is to reduce the temperature difference between the evaporator inlet air temperature and the evaporator inlet refrigerant temperature in order to secure the heating capacity of the heat pump circuit even when the amount of solar radiation is small or not on cloudy or rainy days. A second rotation speed setting unit configured by a temperature difference comparison unit that compares the temperature difference with a predetermined temperature difference, and a rotation speed setting unit that controls the compressor rotation speed so that the temperature difference becomes the predetermined temperature difference,
It differs from the invention of the fifth embodiment shown in FIG. 6 in that it is provided in the compression function force variable control means.

In FIG. 7, the compression function force variable control means 3
Reference numeral 2 denotes an evaporator inlet air temperature T3 detected by an evaporator inlet air temperature sensor 41 and an evaporator inlet refrigerant temperature sensor 3 in addition to a temperature comparison unit 35 and a first rotation speed setting unit 36.
4, the temperature difference T3- from the evaporator inlet refrigerant temperature T2 detected by T4.
A temperature difference comparing unit 46 that compares T2 with a predetermined temperature difference that is set and stored in advance, and a rotation that controls the rotation speed of the variable capacity compressor 20 so that the temperature difference T3-T2 becomes a predetermined temperature difference. Second rotation speed setting unit 3 configured with number setting unit 47
8c.

In the above embodiment, as described in the first embodiment, when the refrigerant circulating in the heat pump circuit 19 by the variable capacity compressor 20 passes through the evaporator 23,
The evaporator is heated by the air heated by the solar heat collector 24 to increase the evaporation temperature, and the temperature comparison unit 35 and the first rotation speed setting unit 36 of the compression function variable control unit 32 control the evaporator inlet refrigerant temperature. The rotation speed of the variable capacity compressor 20 is set so that T2 is substantially equal to the collector inlet air temperature T1.

When the amount of heat from the solar heat collector 24 to be received by the heat pump circuit 19 is insufficient, the compressor rotation speed setting shifts to the second rotation speed setting unit 38c. Next, the evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor 41 and the evaporator inlet refrigerant temperature sensor 34 are detected by the temperature difference comparator 46 of the second rotation speed setting unit 38c.
Difference T3-T from the evaporator inlet refrigerant temperature T2 detected by
2 is compared with a stored predetermined temperature difference.

Then, the rotation speed setting unit 47 determines the temperature difference T
When 3-T2 is larger than the predetermined temperature difference, the rotational speed of the variable capacity compressor 20 is shifted to a smaller direction. When the temperature difference T3-T2 is smaller than the predetermined temperature difference,
The rotational speed of the variable capacity compressor 20 is controlled such that the temperature difference T3-T2 becomes a predetermined temperature difference by shifting the rotational speed of the variable capacity compressor 20 to a larger direction.

Therefore, if the temperature difference between the temperature outside the evaporator 23 (evaporator inlet air temperature T3) and the temperature inside the evaporator 23 (evaporator inlet refrigerant temperature T2) is constant, the evaporator 23 Is constant, that is, the heating capacity of the heat pump circuit 19 is also constant. For example, the temperature difference between the evaporator inlet air temperature T3 and the evaporator inlet refrigerant temperature T2 according to the required heating amount is determined. If a predetermined temperature difference is set in advance, the required heating amount can always be obtained by controlling the rotation speed of the variable capacity compressor 20 so that the temperature difference T3-T2 becomes the predetermined temperature difference.

As described above, in the present invention, the evaporator inlet air temperature sensor 41 for detecting the evaporator inlet air temperature T3 of the evaporator 23, And a temperature T3 detected by the evaporator inlet air temperature sensor 41 and a temperature T2 detected by the evaporator inlet refrigerant temperature sensor 34. The rotational speed of the variable capacity compressor 20 is controlled so that the difference T3-T2 becomes a predetermined temperature difference set in advance.

Thus, the amount of heat exchange of the evaporator 23, that is, the heat pump circuit 19 is heated by the temperature difference T3-T2 between the evaporator inlet air temperature T3 of the evaporator 23 and the evaporator inlet refrigerant temperature T2 of the evaporator 23. Utilizing the characteristics that determine the ability,
By setting the predetermined temperature difference to a value for obtaining a required heating amount, a required heating capacity can be obtained regardless of the outside air temperature and the amount of solar radiation.

Therefore, even when the amount of solar radiation is small or not at all on a cloudy day or a rainy day, the heating operation of the heat pump can be ensured and an efficient heating operation can be performed.

(Embodiment 7) FIG. 8 is a configuration diagram showing a solar heat utilization apparatus according to Embodiment 7 of the present invention. The invention of this embodiment is provided with a heat collector outlet air temperature sensor, and the solar heat detecting means for directly detecting the amount of solar radiation of the third embodiment shown in FIG. 3 is detected by a heat collector inlet air temperature sensor. The third embodiment differs from the third embodiment in that the temperature is compared with the temperature difference between the inlet and outlet air temperature of the heat collector, which compares the temperature with the temperature detected by the air temperature sensor at the outlet of the heat collector. The other contents are the same.

In FIG. 8, reference numeral 48 denotes a heat collector outlet air temperature sensor for detecting the air temperature T5 at the outlet of the solar heat collector 24. The solar calorie detecting means 39a detects the collector inlet air temperature T1 detected by the collector inlet air temperature sensor 33.
And a collector inlet / outlet air temperature difference comparing means 49 for comparing the collector inlet / outlet air temperature difference between the collector outlet air temperature T5 detected by the collector outlet air temperature sensor 48.

The operation and operation of the solar heat utilization apparatus having the above-described structure are the same as those described in the third embodiment.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is heated by the air heated by the solar heat collector 24 to increase the evaporating temperature, and the temperature comparison unit 35 of the compression function force variable control unit 32 and the The number of revolutions of the variable capacity compressor 20 is set by the one revolution number setting unit 36 so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

Then, the amount of solar heat detected by the solar heat detecting means 39a, that is, the collector inlet air temperature T1 detected by the collector inlet air temperature sensor 33 and the collector outlet air temperature sensor 48 are detected. Collector outlet air temperature T
5 is compared with a predetermined value set in advance by the solar heat amount comparing means 40, and the detected solar heat (the heat collector inlet / outlet temperature difference) is compared with the predetermined value. If) is lower than the predetermined value, the variable capacity compressor 20 is operated in accordance with the compressor rotation speed set in advance by the second rotation speed setting unit 38. That is, when the amount of solar heat is lower than the predetermined value, the amount of heat collected by the solar heat collector 24 decreases, indicating that the amount of heat from the solar heat collector 24 to be received by the heat pump circuit 19 is insufficient. The heating capacity of the heat pump is insufficient.

Therefore, in order to secure the necessary heating capacity, the variable compression capacity control means 32 switches the compressor speed to a preset number of rotations of the compressor to operate the variable capacity compressor 20.

Generally, a difference in the air temperature at the entrance and exit of the heat collector is caused by the amount of solar radiation, and the amount of solar radiation, that is, the amount of solar heat and the difference between the air temperature at the entrance and exit of the heat collector are correlated. In practice, due to the heat capacity of the solar heat collector 24, the change in the temperature difference between the inlet and the outlet of the heat collector changes considerably later than the change in the amount of solar radiation.
This characteristic is suitable for avoiding a sudden change in the compressor speed of a heat pump cycle having a large time constant.

As described above, in the invention of this embodiment, the solar heat detecting means 39a is connected to the heat collector inlet air temperature sensor 3 for detecting the air temperature at the inlet of the solar heat collector 24.
3, a collector outlet air temperature sensor 48 for detecting the air temperature at the outlet of the solar collector 24, and a collector inlet / outlet air temperature difference comparing means 49 for comparing the collector inlet / outlet air temperature difference. Therefore, reliable control can be performed by using the temperature rise value of the solar heat collector 24 which is directly related to the amount of solar heat. Further, since the heat collector inlet air temperature sensor 33 and the heat collector outlet air temperature sensor 48 can be shared with other control functions, there is an effect of cost reduction by sharing parts.

(Eighth Embodiment) FIG. 9 is a configuration diagram showing a solar heat utilization apparatus according to an eighth embodiment of the present invention. The invention of this embodiment is different from the first embodiment shown in FIGS. 1 to 8 in that the evaporator of the heat pump circuit and the solar heat collector are arranged adjacent to each other in order to improve the heat exchange efficiency of the evaporator. Different from the inventions of the seventh to seventh embodiments, the other contents are the same.

In FIG. 9, the solar heat collector 24 and the evaporator 23 of the heat pump circuit 19 are arranged adjacent to each other. In the figure, reference numeral 53 denotes a guide tube indicated by a dotted line, which guides the flow of air from the solar heat collector 24 to the evaporator 23.

The operation and operation of the solar heat utilization apparatus having the above-described structure are the same as those described in the first embodiment, and the heat pump circuit 19 is operated by the variable capacity compressor 20.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is guided by the guide cylinder 53 and is heated by the air heated by the solar heat collector 24 to increase the evaporation temperature, and the compression function force variable control means 32 Thus, the rotation speed of the variable capacity compressor 20 is controlled so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

Since the solar heat collector 24 and the evaporator 23 are adjacent to each other, the distance between the solar heat collector 24 and the evaporator 23 is shortened, and the heat loss and the ventilation resistance at the connection (the distance) are reduced. Disappears.

As described above, in the invention of this embodiment,
The configuration in which the solar heat collector 24 and the evaporator are disposed adjacent to each other eliminates heat loss and ventilation resistance from the solar heat collector 24 to the evaporator 23, thereby improving heat exchange efficiency and power of the blowing means 25. An energy saving effect is produced by the reduction.

When the solar heat collector 24 and the evaporator 23 are integrally formed, for example, not only the size and weight of the device can be reduced, but also a passage for guiding air to the evaporator 23 becomes unnecessary. Cost and workability can be improved.

(Embodiment 9) FIG. 10 is a configuration diagram showing a solar heat utilization apparatus according to Embodiment 9 of the present invention. The invention of this embodiment is to increase the operation efficiency and the like of the heat pump circuit.
The point that an opening / closing means for controlling the introduction of outside air in accordance with the amount of solar radiation was provided in the passage between the evaporator and the solar heat collector differs from the inventions of the first to eighth embodiments shown in FIGS. , Other contents are the same.

In FIG. 10, reference numeral 50 denotes a bypass suction portion provided in the guide cylinder 53 near the air inlet of the evaporator 23, reference numeral 51 denotes opening / closing means for opening and closing the bypass suction portion 50,
52 is an opening and closing control means for controlling the opening and closing of the opening and closing means 51,
When the amount of solar radiation is large, the opening / closing means 51 is switched from open to closed. On a cloudy day or a rainy day when the amount of solar radiation is small, control is performed to switch the open / close means 51 from closed to open.

The operation and operation of the solar heat utilization apparatus having the above-described structure are the same as those described in the first embodiment, and the heat pump circuit 19 is controlled by the variable capacity compressor 20.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is guided by the guide cylinder 53 and is heated by the air heated by the solar heat collector 24 to increase the evaporation temperature, and the compression function force variable control means 32 Thus, the rotation speed of the variable capacity compressor 20 is controlled so that the evaporator inlet refrigerant temperature T2 becomes substantially the same as the heat collector inlet air temperature T1.

When the amount of solar radiation is large first, the opening / closing control means 52 switches the opening / closing means 51 from open to closed, and the opening / closing means 51 closes the bypass suction section 50.
Therefore, only the outside air flows into the solar heat collector 24, and the air of the outside air is heated by the high-temperature air that is much higher than the outside air temperature and flows to the evaporator 23, and the refrigerant in the heat pump circuit 19 flowing through the evaporator 23 is removed by the evaporative gas. To

Next, on a cloudy day or a rainy day when the amount of solar radiation is small, the opening / closing control means 52 switches the opening / closing means 51 from the closed state to the open state, and the opening / closing means 51 opens the bypass suction section 50 to blow air. A large amount of outside air is sucked into the inlet of the evaporator 23 from the bypass suction part 50 by the suction force of the means 25. Then, the air merges with the air flowing from the solar heat collector 24 and flows to the evaporator 23.

In this case, since the amount of solar radiation is small, the temperature of the air passing through the solar heat collector 24 rises little, and the temperature of the air that merges and flows into the inlet of the evaporator 23 is almost the same as the outside air temperature. . Since the outside air is introduced from the bypass suction part 50 near the air inlet of the evaporator 23, the ventilation resistance is small, the amount of air passing through the evaporator 23 increases, and the operation efficiency of the heat pump circuit 19 increases.

Therefore, when the amount of solar radiation is large, high efficiency air is directly passed through the evaporator 23 with a small air flow to improve the efficiency. On a cloudy day or a rainy day where the amount of solar radiation is small, the collected air is collected. A large amount of air can flow from the bypass suction part 50 of the guide cylinder 53 forming the outer shell of the heat unit to the evaporator 23 to improve the efficiency. In addition, since the bypass suction unit 50 is closed when the amount of solar radiation is large, natural wind does not flow into the heat collection unit from the bypass suction unit 50 when the outside air wind speed is high. Temperature drop can be prevented.

As described above, in the present invention,
The air inlet of the evaporator 23 is provided with an opening / closing means 51 that can be opened and closed for sucking outside air, and an opening / closing control means 52 that controls the opening and closing of the opening / closing means 51. By bypassing the heat collector 24, the ventilation resistance is reduced, and the power consumption of the blower 25 is reduced. Therefore,
Increase the area of the solar heat collector 24 or the solar heat collector 2
In a design in which a large amount of solar heat is collected by increasing the length of the air flow path flowing through the four surfaces, it is possible to reduce the size and power consumption of the blowing means 25. In particular, when the amount of solar radiation is small, the amount of air passing through the evaporator 23 can be secured to improve the efficiency of the heat pump operation.

(Embodiment 10) FIG. 11 shows Embodiment 1 of the present invention.
It is a block diagram which shows the solar heat utilization apparatus in 0. The invention of this embodiment is designed to increase the operating efficiency of the heat pump circuit, so that the air flow by the blowing means is flowed in the order of the blowing means, the solar heat collector, and the evaporator to heat the motor of the blowing means for heating the evaporator. It differs from the first to ninth embodiments of the present invention shown in FIGS. 1 to 10 in that they are utilized, and the other contents are the same.

In FIG. 11, the air flow generated by the fan of the air blowing means 25 is changed so that the air flows through the motor 26 for driving the fan of the air blowing means 25, the solar heat collector 24, and the evaporator 23 in this order. , Solar heat collector 2
4. Evaporator 23 is provided.

The operation and operation of the solar heat utilization apparatus having the above-described configuration are the same as those described in the first embodiment, and the heat pump circuit 19 is controlled by the variable capacity compressor 20.
When the refrigerant circulating through the evaporator 23 passes through the evaporator 23, the refrigerant is heated by the air heated by the solar heat collector 24 to increase the evaporation temperature, and the compression function variable control means 32 controls the evaporator inlet refrigerant temperature T2. The rotational speed of the variable capacity compressor 20 is controlled so that the temperature is substantially the same as the heat collector inlet air temperature T1.

The motor 2 for driving the blowing means 25
Since the motor 6 consumes power, the motor itself generates heat and becomes high temperature. However, since the motor 26 is exposed to the air blown by the blower 25, the power consumed by the motor 26 becomes heat and is transferred to the air. The air that has received the heat of the motor 26 is heated by the solar collector 24 and further rises in temperature, and exchanges heat with the refrigerant in the evaporator 23. Therefore, according to the configuration of the present embodiment, the power consumed by the motor 26 is heated by the refrigerant. Can be used for

As described above, in the present invention,
By providing a configuration in which the air passes in the order of the blowing means 25, the solar heat collector 24, and the evaporator 23, the heat radiation of the blowing means 26 is received by the air sent from the solar heat collector 24 to the evaporator 23. Then, the heat is exchanged in the evaporator 23, so that the electric power required for the blowing means 25 is effectively used for heating the refrigerant, so that a device having a high operation efficiency can be obtained.

[0106]

As is apparent from the above description, claim 1
According to the present invention, a required heating capacity is secured without being affected by the amount of solar radiation and the outside air temperature, and an efficient heating operation can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a solar heat utilization device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram illustrating a solar heat utilization device according to a second embodiment.

FIG. 3 is a configuration diagram illustrating a solar heat utilization apparatus according to a third embodiment.

FIG. 4 is a configuration diagram illustrating a solar heat utilization device according to a fourth embodiment.

FIG. 5 is a characteristic diagram illustrating general characteristics of a heat pump circuit.

FIG. 6 is a configuration diagram illustrating a solar heat utilization device according to a fifth embodiment of the present invention.

FIG. 7 is a configuration diagram showing a solar heat utilization device according to a sixth embodiment.

FIG. 8 is a configuration diagram illustrating a solar heat utilization device according to a seventh embodiment.

FIG. 9 is a configuration diagram showing a solar heat utilization device according to the eighth embodiment.

FIG. 10 is a configuration diagram illustrating a solar heat utilization device according to a ninth embodiment.

FIG. 11 is a configuration diagram showing a solar heat utilization apparatus according to the tenth embodiment.

FIG. 12 is a configuration diagram showing a conventional solar heat utilization device.

FIG. 13 is a configuration diagram showing a conventional solar heat utilization device.

[Explanation of symbols]

 Reference Signs List 19 heat pump circuit 20 variable capacity compressor 23 evaporator 24 solar heat collector 25 blowing means 32 variable compression function force control means 33 heat collector inlet air temperature sensor 34 evaporator inlet refrigerant temperature sensor 35 temperature comparison unit 36 first rotation Number setting unit 37 Minimum rotation speed comparison unit 38, 38a, 38b, 38c Second rotation speed setting unit 39, 39a Solar heat quantity detection means 40 Solar heat quantity comparison means 41 Evaporator inlet air temperature sensor 42 Revolution speed calculation unit 43 Evaporator Outlet air temperature sensor 44, 46 Temperature difference comparing section 48 Heat collector outlet air temperature sensor 49 Heat collector inlet / outlet air temperature difference comparing means 51 Opening / closing means 52 Opening / closing control means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F25B 1/00 371 F24J 2/04 Z (72) Inventor Yoshitsugu Nishiyama 1006 Odakadoma, Kadoma City, Osaka Matsushita Denki Sangyo Co., Ltd.

Claims (11)

[Claims] 1. A solar heat collector, a heat pump circuit having a variable capacity compressor, an evaporator of the heat pump circuit for exchanging heat with air passing through the solar heat collector, and an inlet of the solar heat collector. A heat collector inlet air temperature sensor for detecting the air temperature of the evaporator, an evaporator inlet refrigerant temperature sensor for detecting the refrigerant inlet temperature of the evaporator, and the evaporator inlet refrigerant temperature substantially equal to the heat collector inlet air temperature. And a compression function variable control means for setting the capacity of the variable capacity compressor. 2. The compressor function variable control means operates the compressor according to a preset compressor rotation speed when the compressor rotation speed setting value is lower than the minimum rotation speed. The solar heat utilization device according to 1. 3. The apparatus according to claim 1, further comprising a solar heat amount detecting means, wherein the compression function force variable control means sets a predetermined compressor rotation speed when the solar heat amount by the solar heat amount detecting means is lower than a predetermined value. Item 2. A solar heat utilization device according to item 1. 4. A compressor function variable control means according to claim 2, wherein the preset compressor rotation speed is a fixed compressor rotation speed corresponding to the maximum heating load of the heat pump.
Or the solar thermal utilization apparatus according to claim 3. 5. An evaporator inlet air temperature sensor for detecting an evaporator inlet air temperature, and the compression function force variable control means detects a preset compressor rotation speed by a temperature detected by the evaporator inlet air temperature sensor. The solar heat utilization device according to claim 2 or 3, wherein the rotation speed of the compressor is set based on the following. 6. An evaporator inlet air temperature sensor for detecting an inlet air temperature of an evaporator, and an evaporator outlet air temperature sensor for detecting an outlet air temperature of the evaporator. The set compressor rotation speed is determined in advance by the temperature difference T3-T4 between the evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor and the evaporator outlet air temperature T4 detected by the evaporator outlet air temperature sensor. The solar heat utilization device according to claim 2 or 3, wherein the rotation speed of the compressor is set to a predetermined temperature difference. 7. An evaporator inlet air temperature sensor for detecting an evaporator inlet air temperature, and an evaporator inlet refrigerant temperature sensor for detecting an evaporator inlet refrigerant temperature, wherein the compression function force variable control means is set in advance. The temperature difference T3-T2 between the evaporator inlet air temperature T3 detected by the evaporator inlet air temperature sensor and the evaporator inlet refrigerant temperature T2 detected by the evaporator inlet refrigerant temperature sensor is set in advance to the determined compressor rotation speed. The solar heat utilization device according to claim 2 or 3, wherein the rotation speed of the compressor is a predetermined temperature difference. 8. The collector outlet air temperature T5 of the solar collector.
Collector air temperature sensor for detecting the temperature of the collector, and the solar calorie detecting means compares the difference between the inlet and outlet air temperature of the collector and the inlet / outlet air temperature of the collector outlet air temperature T5. The solar heat utilization apparatus according to claim 3, further comprising a temperature difference comparison unit. 9. The solar heat utilization device according to claim 1, wherein a solar heat collector and an evaporator are provided adjacent to each other. 10. The air inlet of the evaporator is provided with an openable / closable means for sucking outside air and an open / close control means for controlling the opening / closing of the open / close means. The solar thermal utilization device according to any one of the above. 11. The installation of the blower, the solar collector, and the evaporator such that an air flow generated by the blower passes through a motor of the blower, a solar heat collector, and an evaporator in this order. The solar heat utilization device according to any one of claims 1 to 10, wherein